The old man went back to the school that he used to teach

题目

The old man went back to the school that he used to teach
改错题 只有一处错误

答案

这句有两种改法：
①that改成where
②在句末加in
因为你是在学校中teach,你这句就是teach school了,必须是teach in school,所以必须加in,或者直接将that改为where（因为where=in which）.
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Neil Steven