Câu hỏi:

My sister hair isn't _______

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

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

Who is going to __________ your children when you’re at work?

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

Of course as a student I want _____ all the exams.

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