_____ 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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_____ 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 |