4. Doctors ___________ (research) into the causes of the disease believe they may have found a cure.

3. ￡45，000 _________ (award) to a typist with an injured hand.

2. A group of 80 planes, ___________ (lead) by Lieutenant Commander Egusha, was on its way to attack.

1. Great changes _________ (take place) in China in the past ten years.

10. Many students said they _________ doing endless homework. _{K^S*5U.C#O%下标}

9. She was ___________ when she was poor, but she has been out of debt since she got rich.

8. He had to ____________ by delivering newspaper in his youth.

7. Don’t __________ those rotten vegetables. We can feed them to the pigs.

6. The child ought to be punished. You shouldn’t let him ________ telling lies.

5. The audience ___________ as the acrobat walked along the tightrope between the two buildings.