题目内容
句型转换
He did his housework yesterday. (用this time yesterday改写)
He ________ ________ his housework this time yesterday.
答案：was,doing
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天天向上一本好卷系列答案小学生10分钟应用题系列答案题目内容
句型转换
He did his housework yesterday. (用this time yesterday改写)
He ________ ________ his housework this time yesterday.
天天向上一本好卷系列答案小学生10分钟应用题系列答案