Choose the best replacement for the words in brackets. If they are correct as they are, choose "No improvement".
She [do not like] cold coffee.
Options for question 1 A Option A did not liked Correct answer Your answerB Option B is not liking Correct answer Your answerC Option C does not like Correct answer Your answerD Option D No improvement Correct answer Your answer
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Show the explanation Hide the explanation Answer C · does not like
"She" is singular, so it takes "does": "She does not like cold coffee."
Worth noting
"Is not liking" puts "like" in the continuous, but "like" is a state and is not used with -ing.
Choose the best replacement for the words in brackets. If they are correct as they are, choose "No improvement".
We [have went] to Goa last December.
Options for question 2 A Option A went Correct answer Your answerB Option B had went Correct answer Your answerC Option C have gone Correct answer Your answerD Option D No improvement Correct answer Your answer
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Show the explanation Hide the explanation Answer A · went
"Last December" is a finished time, which takes the simple past: "We went to Goa last December."
Worth noting
"Have gone" fixes the verb form but keeps the present perfect, which never takes "last December".
Choose the best replacement for the words in brackets. If they are correct as they are, choose "No improvement".
He is [more cleverer] than his brother.
Options for question 3 A Option A most clever Correct answer Your answerB Option B cleverer Correct answer Your answerC Option C the cleverest Correct answer Your answerD Option D No improvement Correct answer Your answer
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Show the explanation Hide the explanation Answer B · cleverer
"Cleverer" already means "more clever", so the two cannot be used together: "He is cleverer than his brother."
Worth noting
"The cleverest" is a superlative, used for one out of three or more, never with "than".
Choose the best replacement for the words in brackets. If they are correct as they are, choose "No improvement".
The children [are playing] in the garden right now.
Options for question 4 A Option A is playing Correct answer Your answerB Option B plays Correct answer Your answerC Option C played Correct answer Your answerD Option D No improvement Correct answer Your answer
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Show the explanation Hide the explanation Answer D · No improvement
"Right now" needs the present continuous, and "children" is plural, so "are playing" is correct.
Worth noting
"Is playing" is singular, but "children" is the plural of "child".
Choose the best replacement for the words in brackets. If they are correct as they are, choose "No improvement".
I [am knowing] the answer to this question.
Options for question 5 A Option A knowing Correct answer Your answerB Option B know Correct answer Your answerC Option C have been knowing Correct answer Your answerD Option D No improvement Correct answer Your answer
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Show the explanation Hide the explanation Answer B · know
"Know" is a state, not an action, so it is not used with -ing: "I know the answer."
Choose the best replacement for the words in brackets. If they are correct as they are, choose "No improvement".
Please [discuss about] the plan with your team.
Options for question 6 A Option A discuss Correct answer Your answerB Option B discuss on Correct answer Your answerC Option C discussing about Correct answer Your answerD Option D No improvement Correct answer Your answer
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Show the explanation Hide the explanation Answer A · discuss
"Discuss" takes its object directly: "discuss the plan". It already means "talk about".
Choose the best replacement for the words in brackets. If they are correct as they are, choose "No improvement".
My father [goes] for a walk every morning.
Options for question 7 A Option A go Correct answer Your answerB Option B has went Correct answer Your answerC Option C gone Correct answer Your answerD Option D No improvement Correct answer Your answer
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Show the explanation Hide the explanation Answer D · No improvement
"Every morning" is a habit, which takes the simple present, and "my father" is singular: "goes" is correct.
Worth noting
"Go" is plural, and "has went" mixes "has" with a simple past form.
Choose the best replacement for the words in brackets. If they are correct as they are, choose "No improvement".
Each of the boys [were given] a book.
Options for question 8 A Option A have been given Correct answer Your answerB Option B was given Correct answer Your answerC Option C were giving Correct answer Your answerD Option D No improvement Correct answer Your answer
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Show the explanation Hide the explanation Answer B · was given
The subject is "each", which is singular: "Each of the boys was given a book."
Choose the best replacement for the words in brackets. If they are correct as they are, choose "No improvement".
He [did not came] to school yesterday.
Options for question 9 A Option A did not come Correct answer Your answerB Option B has not come Correct answer Your answerC Option C does not came Correct answer Your answerD Option D No improvement Correct answer Your answer
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Show the explanation Hide the explanation Answer A · did not come
After "did", the verb goes back to its plain form: "He did not come."
Worth noting
"Has not come" cannot take "yesterday", a finished time.
Choose the best replacement for the words in brackets. If they are correct as they are, choose "No improvement".
She is good [in] drawing.
Options for question 10 A Option A on Correct answer Your answerB Option B with Correct answer Your answerC Option C at Correct answer Your answerD Option D No improvement Correct answer Your answer
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Show the explanation Hide the explanation Answer C · at
English says "good at" a skill: "She is good at drawing."
Choose the best replacement for the words in brackets. If they are correct as they are, choose "No improvement".
The Earth [moves] round the Sun.
Options for question 11 A Option A moved Correct answer Your answerB Option B is moved Correct answer Your answerC Option C has moved Correct answer Your answerD Option D No improvement Correct answer Your answer
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Show the explanation Hide the explanation Answer D · No improvement
A fact that is always true takes the simple present: "The Earth moves round the Sun." The sentence is correct.
Worth noting
"Moved" would put a permanent truth in the past, as if it had stopped.
Choose the best replacement for the words in brackets. If they are correct as they are, choose "No improvement".
My sister [is married with] an engineer.
Options for question 12 A Option A is married to Correct answer Your answerB Option B is married by Correct answer Your answerC Option C has married with Correct answer Your answerD Option D No improvement Correct answer Your answer
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Show the explanation Hide the explanation Answer A · is married to
"Married" is followed by "to": "My sister is married to an engineer."
Choose the best replacement for the words in brackets. If they are correct as they are, choose "No improvement".
I have [a lot of luggages] to carry.
Options for question 13 A Option A many luggage Correct answer Your answerB Option B a lot of luggage Correct answer Your answerC Option C a luggages Correct answer Your answerD Option D No improvement Correct answer Your answer
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Show the explanation Hide the explanation Answer B · a lot of luggage
"Luggage" cannot be counted and has no plural: "a lot of luggage".
Worth noting
"Many luggage" fixes the -s but uses "many", which is only for things that can be counted.
Choose the best replacement for the words in brackets. If they are correct as they are, choose "No improvement".
If I [would have known], I would have come earlier.
Options for question 14 A Option A have known Correct answer Your answerB Option B would know Correct answer Your answerC Option C had known Correct answer Your answerD Option D No improvement Correct answer Your answer
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Show the explanation Hide the explanation Answer C · had known
In a past that did not happen, the "if" part takes the past perfect: "If I had known, I would have come."
Worth noting
"Would have" belongs only in the result half of the sentence. Using it twice is a common mistake.
Choose the best replacement for the words in brackets. If they are correct as they are, choose "No improvement".
He [has been living] in this town since 2015.
Options for question 15 A Option A is living Correct answer Your answerB Option B lives Correct answer Your answerC Option C was living Correct answer Your answerD Option D No improvement Correct answer Your answer
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Show the explanation Hide the explanation Answer D · No improvement
"Since 2015" runs from the past to now, which takes a perfect tense. "Has been living" is correct.
Worth noting
"Is living" and "lives" are present tenses, which cannot take "since".
Choose the best replacement for the words in brackets. If they are correct as they are, choose "No improvement".
She insisted [to pay] for the tickets.
Options for question 16 A Option A on paying Correct answer Your answerB Option B for paying Correct answer Your answerC Option C to paying Correct answer Your answerD Option D No improvement Correct answer Your answer
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Show the explanation Hide the explanation Answer A · on paying
"Insist" is followed by "on" and an -ing form: "She insisted on paying."
Choose the best replacement for the words in brackets. If they are correct as they are, choose "No improvement".
[Despite of] the rain, the match went on.
Options for question 17 A Option A In spite Correct answer Your answerB Option B Despite Correct answer Your answerC Option C Although of Correct answer Your answerD Option D No improvement Correct answer Your answer
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Show the explanation Hide the explanation Answer B · Despite
"Despite" never takes "of". The two correct forms are "despite the rain" and "in spite of the rain".
Worth noting
"In spite" alone is missing its "of". The two phrases are easy to mix up.
Choose the best replacement for the words in brackets. If they are correct as they are, choose "No improvement".
The number of cars on the road [have increased] sharply.
Options for question 18 A Option A are increasing Correct answer Your answerB Option B have been increased Correct answer Your answerC Option C has increased Correct answer Your answerD Option D No improvement Correct answer Your answer
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Show the explanation Hide the explanation Answer C · has increased
"The number of" means a count, which is singular: "The number of cars has increased."
Worth noting
"Cars" stands near the verb, but the subject is "the number".
Choose the best replacement for the words in brackets. If they are correct as they are, choose "No improvement".
He asked me [where did I live].
Options for question 19 A Option A where do I live Correct answer Your answerB Option B where was I living Correct answer Your answerC Option C where I lived Correct answer Your answerD Option D No improvement Correct answer Your answer
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Show the explanation Hide the explanation Answer C · where I lived
A reported question is not a question any more, so it takes the normal order, subject before verb: "He asked me where I lived."
Worth noting
"Where was I living" still has the question order, with the verb before "I".
Choose the best replacement for the words in brackets. If they are correct as they are, choose "No improvement".
Neither of the two answers [are correct].
Options for question 20 A Option A were correct Correct answer Your answerB Option B is correct Correct answer Your answerC Option C have been correct Correct answer Your answerD Option D No improvement Correct answer Your answer
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Show the explanation Hide the explanation Answer B · is correct
"Neither of" means not one and not the other. In careful English it takes a singular verb: "Neither of the two answers is correct."
Choose the best replacement for the words in brackets. If they are correct as they are, choose "No improvement".
The film was so boring [that we left] before the interval.
Options for question 21 A Option A that we had left Correct answer Your answerB Option B so we left Correct answer Your answerC Option C as we left Correct answer Your answerD Option D No improvement Correct answer Your answer
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Show the explanation Hide the explanation Answer D · No improvement
"So" before an adjective is answered by "that": "so boring that we left". The sentence is correct.
Worth noting
"So we left" uses "so" twice. "That we had left" puts the leaving before the boredom.
Choose the best replacement for the words in brackets. If they are correct as they are, choose "No improvement".
I look forward to [hear] from you.
Options for question 22 A Option A hearing Correct answer Your answerB Option B heard Correct answer Your answerC Option C have heard Correct answer Your answerD Option D No improvement Correct answer Your answer
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Show the explanation Hide the explanation Answer A · hearing
In "look forward to", the "to" is a preposition, so it takes an -ing form: "I look forward to hearing from you."
Choose the best replacement for the words in brackets. If they are correct as they are, choose "No improvement".
He [is working] in this bank for five years.
Options for question 23 A Option A is been working Correct answer Your answerB Option B has been working Correct answer Your answerC Option C works Correct answer Your answerD Option D No improvement Correct answer Your answer
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Show the explanation Hide the explanation Answer B · has been working
"For five years" up to now needs a perfect tense: "He has been working in this bank for five years."
Worth noting
"Works" is present and cannot take "for five years" in this sense, just as "is working" cannot.
Choose the best replacement for the words in brackets. If they are correct as they are, choose "No improvement".
The teacher made us [to rewrite] the essay.
Options for question 24 A Option A rewriting Correct answer Your answerB Option B rewrote Correct answer Your answerC Option C rewrite Correct answer Your answerD Option D No improvement Correct answer Your answer
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Show the explanation Hide the explanation Answer C · rewrite
"Make" and "let" are followed by a person and the plain verb, with no "to": "made us rewrite the essay".
Worth noting
Most verbs of this kind take "to" ("asked us to rewrite"), which is why "made us to rewrite" sounds right.
Choose the best replacement for the words in brackets. If they are correct as they are, choose "No improvement".
The police [has caught] the thief.
Options for question 25 A Option A has been caught Correct answer Your answerB Option B was catching Correct answer Your answerC Option C have caught Correct answer Your answerD Option D No improvement Correct answer Your answer
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Show the explanation Hide the explanation Answer C · have caught
"Police" is always plural, so it takes "have": "The police have caught the thief."
Worth noting
"Has been caught" is passive, which would mean the police were caught.
Choose the best replacement for the words in brackets. If they are correct as they are, choose "No improvement".
[Although he was ill, but] he went to work.
Options for question 26 A Option A Though he was ill, but Correct answer Your answerB Option B Despite he was ill, Correct answer Your answerC Option C Although he was ill, Correct answer Your answerD Option D No improvement Correct answer Your answer
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Show the explanation Hide the explanation Answer C · Although he was ill,
"Although" already joins the two halves, so "but" is one joining word too many: "Although he was ill, he went to work."
Worth noting
"Despite" is followed by a noun or an -ing form ("despite being ill"), not by "he was".
Choose the best replacement for the words in brackets. If they are correct as they are, choose "No improvement".
We [reached at] the airport before six.
Options for question 27 A Option A reached Correct answer Your answerB Option B reached to Correct answer Your answerC Option C arrived Correct answer Your answerD Option D No improvement Correct answer Your answer
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Show the explanation Hide the explanation Answer A · reached
"Reach" takes its object directly: "We reached the airport."
Worth noting
"Arrived" needs "at" before a place: "arrived at the airport". On its own, it cannot take "the airport".
Choose the best replacement for the words in brackets. If they are correct as they are, choose "No improvement".
If it [will rain] tomorrow, we will stay at home.
Options for question 28 A Option A would rain Correct answer Your answerB Option B rains Correct answer Your answerC Option C rained Correct answer Your answerD Option D No improvement Correct answer Your answer
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Show the explanation Hide the explanation Answer B · rains
In a real condition about the future, the "if" part takes the present: "If it rains tomorrow."
Worth noting
"Will" belongs to the result ("we will stay"), never after "if" in this kind of sentence.
Choose the best replacement for the words in brackets. If they are correct as they are, choose "No improvement".
The train [had left] before we reached the station.
Options for question 29 A Option A has left Correct answer Your answerB Option B leaves Correct answer Your answerC Option C is left Correct answer Your answerD Option D No improvement Correct answer Your answer
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Show the explanation Hide the explanation Answer D · No improvement
The train left first and we reached later. The earlier of two past events takes the past perfect, so "had left" is correct.
Worth noting
"Has left" is present perfect, which cannot sit beside the past "reached".
Choose the best replacement for the words in brackets. If they are correct as they are, choose "No improvement".
My friend and [me] went to the fair.
Options for question 30 A Option A I Correct answer Your answerB Option B myself Correct answer Your answerC Option C mine Correct answer Your answerD Option D No improvement Correct answer Your answer
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Show the explanation Hide the explanation Answer A · I
The words are the subject of "went", so the pronoun must be the subject form: "My friend and I went to the fair."
Worth noting
"Myself" is used only when "I" has already appeared, as in "I hurt myself".
Choose the best replacement for the words in brackets. If they are correct as they are, choose "No improvement".
She sings [very good].
Options for question 31 A Option A very goodly Correct answer Your answerB Option B much good Correct answer Your answerC Option C very well Correct answer Your answerD Option D No improvement Correct answer Your answer
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Show the explanation Hide the explanation Answer C · very well
The word describes how she sings, so it must be an adverb: "She sings very well."
Worth noting
"Goodly" is not the adverb of "good". The adverb is "well".
Choose the best replacement for the words in brackets. If they are correct as they are, choose "No improvement".
He has been ill [since three days].
Options for question 32 A Option A from three days Correct answer Your answerB Option B for three days Correct answer Your answerC Option C since three days ago Correct answer Your answerD Option D No improvement Correct answer Your answer
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Show the explanation Hide the explanation Answer B · for three days
"Three days" is a length of time, which takes "for": "He has been ill for three days."
Worth noting
"Since" needs a starting point, such as "since Monday". "Since three days ago" mixes the two.
Choose the best replacement for the words in brackets. If they are correct as they are, choose "No improvement".
Let him [to go] home early.
Options for question 33 A Option A go Correct answer Your answerB Option B going Correct answer Your answerC Option C goes Correct answer Your answerD Option D No improvement Correct answer Your answer
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Show the explanation Hide the explanation Answer A · go
"Let" is followed by a person and the plain verb, with no "to": "Let him go home early."
Choose the best replacement for the words in brackets. If they are correct as they are, choose "No improvement".
I prefer walking [than] cycling.
Options for question 34 A Option A over than Correct answer Your answerB Option B to Correct answer Your answerC Option C rather Correct answer Your answerD Option D No improvement Correct answer Your answer
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Show the explanation Hide the explanation Answer B · to
"Prefer" takes "to" when it compares two things: "I prefer walking to cycling."
Worth noting
"Than" follows "rather" ("I would rather walk than cycle"), but "prefer" takes "to".
Choose the best replacement for the words in brackets. If they are correct as they are, choose "No improvement".
[Hardly had I reached] the gate when the bus left.
Options for question 35 A Option A Hardly I had reached Correct answer Your answerB Option B Hardly did I reached Correct answer Your answerC Option C No sooner I had reached Correct answer Your answerD Option D No improvement Correct answer Your answer
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Show the explanation Hide the explanation Answer D · No improvement
"Hardly" at the start turns the verb round, "hardly had I reached", and is followed by "when". The sentence is correct.
Worth noting
"No sooner" would need "than", not "when", and it too turns the verb round.
Choose the best replacement for the words in brackets. If they are correct as they are, choose "No improvement".
She is one of those women who [has] always helped the poor.
Options for question 36 A Option A have Correct answer Your answerB Option B is Correct answer Your answerC Option C was Correct answer Your answerD Option D No improvement Correct answer Your answer
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Show the explanation Hide the explanation Answer A · have
"Who" refers to "those women", which is plural, so the verb is plural: "women who have always helped".
Worth noting
"One" at the start tempts a singular verb. But "who" points to "women", the nearest noun it describes.
Choose the best replacement for the words in brackets. If they are correct as they are, choose "No improvement".
The more you practise, [the better you will become].
Options for question 37 A Option A better you will become Correct answer Your answerB Option B the best you will become Correct answer Your answerC Option C more better you become Correct answer Your answerD Option D No improvement Correct answer Your answer
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Show the explanation Hide the explanation Answer D · No improvement
"The more ..., the better ..." is a fixed pair, and both halves need "the". The sentence is correct.
Worth noting
"Better you will become" drops the second "the", which the pair needs.
Choose the best replacement for the words in brackets. If they are correct as they are, choose "No improvement".
Walking down the road, [a stone hit me] on the head.
Options for question 38 A Option A a stone was hitting me Correct answer Your answerB Option B I was hit by a stone Correct answer Your answerC Option C a stone had hit me Correct answer Your answerD Option D No improvement Correct answer Your answer
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Show the explanation Hide the explanation Answer B · I was hit by a stone
An opening phrase like "walking down the road" describes the subject that comes next. The stone was not walking, so the subject must be "I": "I was hit by a stone".
Choose the best replacement for the words in brackets. If they are correct as they are, choose "No improvement".
No sooner did the rain stop [when] the children rushed out.
Options for question 39 A Option A than Correct answer Your answerB Option B then Correct answer Your answerC Option C that Correct answer Your answerD Option D No improvement Correct answer Your answer
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Show the explanation Hide the explanation Answer A · than
"No sooner" is always paired with "than": "No sooner did the rain stop than the children rushed out."
Worth noting
"Then" looks like "than" but means "next". "When" goes with "hardly" and "scarcely".
Choose the best replacement for the words in brackets. If they are correct as they are, choose "No improvement".
She would rather [to walk] than take the bus.
Options for question 40 A Option A walking Correct answer Your answerB Option B walked Correct answer Your answerC Option C walk Correct answer Your answerD Option D No improvement Correct answer Your answer
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Show the explanation Hide the explanation Answer C · walk
"Would rather" is followed by the plain verb, with no "to": "She would rather walk than take the bus."
Worth noting
"Would rather walked" is used only when another person follows, as in "I would rather you walked".
Choose the best replacement for the words in brackets. If they are correct as they are, choose "No improvement".
He did not come to the party, and [neither did his sister].
Options for question 41 A Option A neither his sister did Correct answer Your answerB Option B his sister neither came Correct answer Your answerC Option C also his sister did not Correct answer Your answerD Option D No improvement Correct answer Your answer
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Show the explanation Hide the explanation Answer D · No improvement
"Neither" at the start of a clause turns the verb round, "neither did his sister", and the sentence is correct.
Worth noting
"Neither his sister did" keeps the normal order, which "neither" does not allow at the start.
Choose the best replacement for the words in brackets. If they are correct as they are, choose "No improvement".
Would you mind [to open] the window?
Options for question 42 A Option A open Correct answer Your answerB Option B to opening Correct answer Your answerC Option C opening Correct answer Your answerD Option D No improvement Correct answer Your answer
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Show the explanation Hide the explanation Answer C · opening
"Mind" is followed by an -ing form: "Would you mind opening the window?"
Choose the best replacement for the words in brackets. If they are correct as they are, choose "No improvement".
The girl [who's] bag was stolen went to the police.
Options for question 43 A Option A whom Correct answer Your answerB Option B whose Correct answer Your answerC Option C which Correct answer Your answerD Option D No improvement Correct answer Your answer
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Show the explanation Hide the explanation Answer B · whose
The word must show that the bag belongs to the girl, which is "whose": "The girl whose bag was stolen."
Worth noting
"Who's" means "who is", which makes no sense here: "the girl who is bag".
Choose the best replacement for the words in brackets. If they are correct as they are, choose "No improvement".
He [lay] the books on the table and left.
Options for question 44 A Option A lain Correct answer Your answerB Option B lied Correct answer Your answerC Option C laid Correct answer Your answerD Option D No improvement Correct answer Your answer
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Show the explanation Hide the explanation Answer C · laid
Putting something down is "lay", and its past is "laid": "He laid the books on the table."
Worth noting
"Lay" is the past of "lie", which means to rest, as in "he lay down". It cannot take an object like "the books".
Choose the best replacement for the words in brackets. If they are correct as they are, choose "No improvement".
The book, [along with its notes, are] on the shelf.
Options for question 45 A Option A along with its notes, is Correct answer Your answerB Option B and its notes, is Correct answer Your answerC Option C along with its notes, were Correct answer Your answerD Option D No improvement Correct answer Your answer
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Show the explanation Hide the explanation Answer A · along with its notes, is
The subject is "the book". "Along with its notes" does not change it, so the verb is singular: "is".
Worth noting
"And its notes" would make the subject plural, and then "is" would be wrong.
Choose the best replacement for the words in brackets. If they are correct as they are, choose "No improvement".
Not only [she sings] but she also dances.
Options for question 46 A Option A she sang Correct answer Your answerB Option B sings she Correct answer Your answerC Option C does she sing Correct answer Your answerD Option D No improvement Correct answer Your answer
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Show the explanation Hide the explanation Answer C · does she sing
"Not only" at the start turns the verb round with "does": "Not only does she sing, but she also dances."
Worth noting
"Sings she" turns the order round but leaves out "does", which a present verb needs.
Choose the best replacement for the words in brackets. If they are correct as they are, choose "No improvement".
I would have helped you if you [would have asked] me.
Options for question 47 A Option A had asked Correct answer Your answerB Option B have asked Correct answer Your answerC Option C asked Correct answer Your answerD Option D No improvement Correct answer Your answer
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Show the explanation Hide the explanation Answer A · had asked
The "if" part of a past that did not happen takes the past perfect: "if you had asked me".
Worth noting
"Asked" belongs to an imagined present ("I would help if you asked"). The result "would have helped" needs "had asked".
Choose the best replacement for the words in brackets. If they are correct as they are, choose "No improvement".
Every one of the players [was praised] by the coach.
Options for question 48 A Option A were praised Correct answer Your answerB Option B have been praised Correct answer Your answerC Option C are praised Correct answer Your answerD Option D No improvement Correct answer Your answer
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Show the explanation Hide the explanation Answer D · No improvement
The subject is "every one", which is singular, so "was praised" is correct.
Worth noting
"Players" is plural and near the verb, but the subject is "every one".
Choose the best replacement for the words in brackets. If they are correct as they are, choose "No improvement".
She [has returned] from Delhi yesterday.
Options for question 49 A Option A had returned Correct answer Your answerB Option B returned Correct answer Your answerC Option C has been returning Correct answer Your answerD Option D No improvement Correct answer Your answer
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Show the explanation Hide the explanation Answer B · returned
"Yesterday" is a finished time, which takes the simple past: "She returned from Delhi yesterday."
Worth noting
"Had returned" needs a second, later past event to be earlier than, and the sentence has none.
Choose the best replacement for the words in brackets. If they are correct as they are, choose "No improvement".
The ship [sank] in a storm in 1912.
Options for question 50 A Option A sunk Correct answer Your answerB Option B has sunk Correct answer Your answerC Option C was sinked Correct answer Your answerD Option D No improvement Correct answer Your answer
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Show the explanation Hide the explanation Answer D · No improvement
The forms are sink, sank, sunk. A finished time like "in 1912" takes the simple past, "sank", so the sentence is correct.
Worth noting
"Sunk" is the past participle, used after "has" or "had". "Sinked" is not a word.