Mary _______ her mother with the housework, but she didn’t.

77 — Have all the important letters beendelivered at the first time— I’m sorry _______ only 40% of them

Can you imagine what life will be like in _____ time-I think it must be much better than now .

As we all know, many Chinese words have come into English, ___ typhoon, tofu and kung fu.

You must apologize ________ your sister ________ being so rude.—No wayIt was her fault[ ]