What _______ you do? I ______ smoke.A. is … can’t B. mustn’t … must C. shouldn’t … shouldn’t
Look at _______ picture.
I want to find a good book. I'm going to the _______.
_____ are you going to Beijing?
--- She cleans streets. Who's she? --- Oh, she is a _______.
My uncle is _____ accountant. He works in _____ air-conditioner company.