Rearrange the parts to make a meaningful sentence.

P. the city built

Q. the rainwater

R. a proper drain for

S. it is high time

Explanation

1. 01

   "It is high time" is followed by a past form even though it means now: S, then P "the city built".

2. 02

   Built what? R "a proper drain for", and "for" needs what the drain carries: Q.

3. 03

   So the order is SPRQ: "It is high time the city built a proper drain for the rainwater."