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While Iwas reading a book,an alien came into my room.改为一般疑问句,要怎么改?While I was reading a book,an alien came into my room.

分类: 作业答案 • 2022-04-13 15:56:29
问题描述：

While Iwas reading a book,an alien came into my room.改为一般疑问句,要怎么改?
While I was reading a book,an alien came into my room.

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