31. They demanded that the books to the school library at once.A. returnB. should returnC.

发布时间：2020-08-16 06:34:43


31. They demanded that the books        to the school library at once.
A. return
B. should return
C. be returned
D. would be returned

网友回答

A. return
B. should return
(答案→)C. be returned
D. would be returned
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