Câu hỏi:

My sister hair isn't _______

We decided not to go out for meal _________ we were too tired.

I like bananas, __________my brother doesn’t.

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

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

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

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