—____________ we leave the library before 5 o'clock?
—No, you needn't. You can stay here until 5:30.
- A.Must
- B.May
- C.Can
正确答案及解析
正确答案
解析
句意：——我们必须在五点钟之前离开图书馆么？——不，你没必要。你可以在这儿待到五点半。
考查情态动词。must必须；may可能；can能够，可以。根据“No, you needn't. Youcan stay here until 5:30”可知问句表达的是“是不是必须在五点钟之前离开图书馆”，用情态动词must提问，否定回答用needn't表示没有必要。故选A。
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