24．It is a rule in our school that no booksout unless you have a library card.A. must be t

问题补充：

24．It is a rule in our school that no booksout unless you have a library card.

A. must be taken

B. might take

C. can be taken

D. should be taken

答案：

A. must be taken

B. might take

(答案→)C. can be taken

D. should be taken

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