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快来帮我做同义句转换YoumustreturnthebookstothelibraryattheendofthetermYoumustthebookstothelibraryattheendoftheterm

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快来帮我做同义句转换
You must return the books to the library at the end of the term
You must ______ the books _______to the library at the end of the term
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back