【强化训练】

　　1. If city noises ____ from increasing，people ____ shout to be heard even at dinner．

　　A． are not kept；will have to

　　B． are not kept；have

　　C． do not keep；will have to

　　D． do not keep；have to

　　2. The fifth generation computers, with artificial intelligence, are ____and perfected now.

　　A. developed

　　B. have developed

　　C. are being developed

　　D. will have been developed

　　3. --- ____ the sports meet might be put off．

　

　--- Yes，it all depends on the weather．

　　A． I've been told B． I've told

　　C． I'm told D． I told

　　4. I need one more stamp before my collection ___.

　　A. has completed B. completes

　　C. has been completed D. is completed

　　5. Rainforests ___ and burned at such a speed that they will disappear from the earth in the near future.

　　A. cut B. are cut

　　C. are being cut D. had been cut

　　6. The new suspension bridge ___ by the end of last month.

　　A. has been designed

　　B. had been designed

　　C. was designed

　　D. would be designed

　　7. When a pencil is partly in a glass of water, it looks as if it ____.

　　A. breaks B. has broken

　　C. was broken D. had been broken

　　8. Great changes ___ in the city, and a lot of factories ___.

　　A. have been taken place; have been set up

　　B. have taken place; have been set up

　　C. have taken place; have set up

　　D. were taken place; were set up

　　9. That suit __ over 60 dollars.

　　A. had costed B. costed C. is costed D. cost

　　10. --- Look! Everything here is under construction.

　　--- What’s the pretty small house that __ for?

　　A. is being built B. has been built

　　C. is built D. is building

　　11.--- Do you like the material?

　　--- Yes, it ___ very soft.

　　A. is feeling B. felt

　　C. feels D. is felt

　　12. It is difficult for a foreigner ____ Chinese．

　　A． write B． to write

　　C． to be written D． written

　　13. I have no more letters ____ ，thank you．

　　A． to type B． typing

　　C． to be typed D． typed

　　14. Take care! Don’t drop the ink on your shirt, for it __ easily.

　　A. won’t wash out B. won’t be washed out

　　C. isn’t washed out D. isn’t washing out

　　15. Nobody noticed the thief slip into the house because the lights happened to ___.

　　A. be put up B. give in

　　C. be turned on D. go out

　　16. The computers on the table ___ Professor Smith.

　　A. belongs B. are belonged to

　　C. belongs to D. belong to

　　17. --- What do you think of the book?

　　---Oh, excellent. It’s worth ___ a second time.

　　A. to read B. to be read C. reading D. being read

　　18. The squirrel was lucky that it just missed ___. A. catching B. to be caught

　　C. being caught D. to catch

　　19. This page needed ___ again.

　　A. being checked B. checked

　　C. to check D. to be checked

　　20. ___ many times, the boy still didn’t know how to do the exercises

　　A. Having taught B. Having been taught

　　C. taught D. Teaching

　　key 1--5 ACADC 6--10 BCBDA

　　11--15 CBCAD 16--20 DCCDB

　　(作者：安徽 马爱军)

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