Câu hỏi:

My sister hair isn't _______

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

What _____ of learning English do you find most difficult? Is it grammar rules or speaking?

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.

Do you happen to know the name of the _____?