Câu hỏi:

Please turn __________ the gas. I want to cook my lunch.

Our energy will soon come to an end if we don’t__________ it.

The children like to put ___________ nice clothes when they go out.

If there is a mechanical problem, we suggest ______ the manufacturer directly.

If you want to save money, you should ________the amount of water your family use

Mary’s eyes are weak, __________, she has to wear glasses.

My shoes are dirty. I’d better take them ________before I come in.