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-Lookatthatgirlunderthetree.IsitAnn?-It

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-Lookatthatgirlunderthetree.IsitAnn?-It

-Look at that girl under the tree. Is it Ann?

-It ______ be Ann. She is reading in the library now.

A. can                   B. can’t          C. must               D. mustn’t

【回答】

B

知识点:情态动词

题型:选择题