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. Mary’s and Peter’s9. Li Lei has been to __________ many times this month.C. Mary’s and PeterB. Mary and PeterA. Mary and Peter’s D. the person8. ________ mothers couldn’t go to the meeting, because they have gone to Shanghai .C. the peopleB. personA. peopleD. 25 minutes walk7. An old _______ wants to see you.B. 25 minute’s walkC. 25 minute walkA. 25 minutes’ walkhis home. Exercise of when, while一. 用when或while填空1. _____ the teacher came in, we were talking._____ we were talking, the teacher came in.2. He was driving along ____ suddenly a woman appeared.3. ____ Jack was waiting at the door, an old woman called to him.4. He was re