7. Don’t watch TV. It’s too late. Please _______ and go to bed right now.

8. Computers are useful. They can ________ sending E-mail.

9. If you’ve lost this book, you have to _______ it.

10. Both of his feet were hurt in the accident. _______ a doctor, please.

【练习答案】

一.1.A 2.B 3.A 4.A 5.B 6.C 7.A 8.D 9.B 10.D 11.A 12.D 13.D 14.A 15.C 16.C 17.A 18.D 19.C 20.C 二. 1. was built 2.was 3. to use 4. have become 5. are 6. be made 7. are getting 8. will be 9.

are 10. be put

三. 1.riding 2.used 3.is 4.have not felt 5.is raining 6. is becoming 7.seeing 8.sayig 9.is grown

10.have been planted

四. 1.will fall 2.is allowed 3.have received 4.was showing 5.would not be 6.keep on 7.turn it

off 8.be used for 9.pay for 10.Send for