（2015•青岛）You return the book now. You can keep it until next week if you like.

题型：单选题题类：真题难易度：普通

You return the book now. You can keep it until next week if you like.

A、have to B、can't C、mustn't D、needn't

举一反三

—No, it _______ be his. I saw an old man put it here just now.

-- I'm afraid not. I have lots of homework to do.

—Thank you. Then I _______ go to the supermarket.

—No，you ． You can choose whatever you like．

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