— Susan, would you like to go hiking with us this afternoon?— I'd love to, but I study for a test.A. may B. have to C. can
—Mum, must I stay there the whole day? —No, you .You come back after lunch, if you like.
I think _______ necessary for you _______ breakfast.
You’d better _______ too much meat. You are much too fat.
The old man was _______ sad _______ say a word when he heard the bad news.
—Why do you like living in the countryside? —Because there’s _______ noise and _______ cars there.