All books are to be returned to the library before the end of the term.
学期结束前，所有借的书都必须归还图书馆。
The book you borrowed last week must be returned to the library before next Wednesday.
你上周借的书必须在下星期三以前还给图书馆。
According to our records, the books you have borrowed should now be returned to the library.
根据我们的记录，你借的书现在应该还给图书馆了。
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