While Iwas reading a book,an alien came into my room.改为一般疑问句,要怎么改?
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.
答
Did an alien come into your room while you were reading a book?