2. 职称英语
  3. The student asked the librarian for help because he couldn’t find the book he (n

The student asked the librarian for help because he couldn’t find the book he (n

游客2023-09-24  42
问题 The student asked the librarian for help because he couldn’t find the book he (need)______.
选项
答案 needed
解析 本题考查定语从句的用法。he needed做book的定语，所以空格处填needed。本句是一个含有原因状语从句的主从复合句，在原因状语从句中又含有一个省略了that的定语从句修饰前面的先行词book。定语从句的时态由其主句“he couldn’t find the book”所在句子决定，应使用过去时。因此，空格处应该填needed。
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