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  • 更新 2022-09-03
  • 科目 英语
  • 题型 单选题
  • 难度 中等
  • 浏览 841

_____ 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