4. The suspect insisted he was not guilty.　 (对划线部分提问)

3. He was attacked with a knife.　 (对划线部分提问)

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2. He has found something suspicious already.　 (改为否定句)

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1. Someone saw him running down Upper Street at 11 pm last night. (改为被动语态)

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13. It ______________ (report) that the pollution is getting worse and worse. 　

12. My uncle ______________ ( leave ) for Shanghai when we got to the airport..

11. Jenny ______________ ( read ) a book when her mother came home.　　　　

10. I will tell you as soon as he ____________ ( come ) back.

9. They both take turns ______________ ( look ) after the old man.

8. It is time for us _______________ ( play ) baseball.