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问题: 3个改错

Did you visit your sister in Monday morning?

Five kids stayed at home and watch TV last week

He sitted there for a long time without doing anything

解答:

Did you visit your sister in Monday morning?
Monday morning是具体时间,要用on
Five kids stayed at home and watch TV last week
and表示并列,前后的时态要一样,watch应该改成watched
He sitted there for a long time without doing anything
sit的过去时不是sitted,是sat