11. ____ with each other, two systems can work better.

　　A) When combine

　　C) When combined

　　B) When combining

　　D) When they combined

　　12. It's important that everyone ____ here on time.

　　A) is

　　B) will be

　　C) must be

　　D) be

　　13. The stormy weather gradually gave _____ to a period of sunshine.

　　A) room

　　B) way

　　C) space

　　D) place

　　14. I could not do anything except just _____ for him to come round.

　　A) waiting

　　B) to wait

　　C) waited

　　D) wait

　　15. I can't _____ the sight of that poor man.

　　A) suffer

　　B) endure

　　C) bear

　　D) put up

　　16. Wang Ming ____ ill. I saw him playing basketball a moment ago.

　　A) needn't have been

　　C) couldn't have been

　　B) must have been

　　D) can't be

　　17. ____ that her son had fallen from a tree and broken his leg, she hurried back home.

　　A) Having been told

　　C) Having told

　　B) Telling

　　D) To be told

　　18. At present ____ than doing well in our socialist economic construction.

　　A) nothing is more important

　　C) much is more important

　　B) nothing is less important

　　D) anything is more important

　　19. Give up smoking, ____ you will have a good health.

　　A) or

　　B)and

　　C) so that

　　D) otherwise

　　20. Taking her doctor's advice, she has now ____ on smoking.

　　A) cut up

　　B) cut ou

　　t C) cut off

　　D) cut down

　　答案：

　　【1.D2.B3.C4.D5.C6.A7.C8.A9.C10.B】

　　【11.C 12.D 13.B 14.B 15.C. 16.C 17.A 18.A 19.B 20.D】