18. Once _____ what to do, these computers will show great power in carrying it out.

A．to teach　　　　　 B．teaches　　　　 C．teaching　　　 D．taught

17. -Who knows where Terry is?

-The reason _____Terry is absent is _____his father had an accident.

A. why, because　 B. why, that 　C. that, because　　 D. that , /

16. Do you know the difficulty he had ____ the work?

A. on finishing　　　　　 　B. with finishing 　　

C. finishing　 　　　　　　D. having finished

15．He is clever, but ____, he makes many mistakes.

A．on the contrary 　　　　　　　　　　 B．on the other side　

C．on the other hand　 　　　　　　　　 D．on one hand

14. The secretary worked late into the night,_____ a long speech for the president.

A. to prepare　 B. preparing　 C. prepared　　 D. was preparing

13.John was caught ____ the earthquake ____ caused a lot of damage.

A．by; which　 　　　　 B．in; which　 　 C．by; in which　　 　　 D．in; in which

12. The teacher said _____.

A.the earth moves around the sun.　　 B.Susan will fail in the exam.

C.you are right.　　　　　　　　　　 　　　 D. he will go with us.

11. In order to _____ money to _____ his family, he left the village and found a job in a faraway city.

A. get, raise　　 B. look for, keep　 C. earn, grow　 D. make , keep

10. Look at the boy in tears! You ______ him for his failure in the math exam. In fact, half of his class have failed.

A. shouldn’t have beaten 　　　　　　　 　　B. needn’t beat

C. mustn’t have beaten 　　　　　　　　　　 D. shouldn’t beat

9. Many people agree that ______good knowledge of English is a must in ______ international trade today.

A. /…the　　　　 B. the…an　　　　 C. the…the　　　　　 D. a…/