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

问题描述:

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

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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Have a good day~
Neil Steven