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  • 更新 2022-09-03
  • 科目 英语
  • 题型 单选题
  • 难度 中等
  • 浏览 842

_____ in the library regulations that any book borrowed be returned by due time, or the borrower will be fined.

A.What is required B.It is required
C.As is required D.Which is required
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inthelibraryregulationsthatany