It’s important that the librarian ____________(确认图书按时归还)． make sure the books (s

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问题 It’s important that the librarian ____________(确认图书按时归还)．

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答案 make sure the books (should) be returned in time

解析从句：主语从句it is important that…虚拟语气：此处主语从句应使用“should+动词原形”，should可以省略。语态：此处“归还”应使用被动语态be returned。词组：make sure(确认)

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