题目内容
2．You mustreturn（归还） the books to the library on time．分析 你必须按时把书还给图书馆．
解答 答案：return．
根据提示汉语结合语境推测句意是"你必须按时把书还给图书馆．"，根据设空处前面的must判断填动词原形，"归还"的英文是return，所以答案是：return
点评 做这类题型，首先根据所给汉语明确句子所要考查的单词或短语的拼写，再结合相关语法知识对单词或短语做出形式上的变化．
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