单项选择题
M: How long can I keep them W: Ten days. Then you will have to return them; otherwise you will be fined for being overdue.
A. In a library. B. In a hospital. C. At a bank. D. In a store.
A.common B.false C.habitual D.indirect
A. He must hand in a full report on the exhibition. B. He is too busy to go along. C. He has to wash his hands first. D. He has already seen the show.