unit 13

　　1. Today books are_____ to everyone because they are no longer expensive.

　　A. available B. preferable C. reliable D. actual

　　2. We shall ask for samples_____ and then we can make our decision.

　　A. to be sent B. being sent C. to sent D. to have been sent

　　3. The forest fire caused by the volcano is difficult to be_____.

　　A. put off B. put away C. put out D. put up

　　4. It was not_____ midnight that they discovered the children were not in their beds.

　　A. before B. at C. after D. until

　　5. The girl is not happy at the new school. She has _____ friends there.

　　A. few B. a few C. little D. quite a few

　　6. Robots have already_____ human tasks in the industrial field.

　　A. taken on B. taken out C. taken up D. taken over

　　7. I can't find the recorder in the room. It ____ by somebody.

　　A. must have taken B. may have taken

　　C. may have been taken D. should have been taken

　　8. He took the medicine，but it didn't have any_____.

　　A. answer B. cause C. effect D. work

　　9. It is_____ that over one million Americans now live below the poverty line.

　　A. judged B. estimated C. calculated D. considered

　　10. He left____ an important detail in his account.

　　A. off B. over C. behind D. out

　　11. When there are small children around，it is necessary to put bottles of pills out of____.

　　A. hand B. hold C. place D. reach

　　12. I hadn't seen him for years，but I_____ his voice on the telephone.

　　A. realized B. discovered C. recognized D. heard

　　13. This place，originally a small town，has been____ into a modern city.

　　A. transported B. transferred C. transmitted D. transformed

　　14. There was nobody____ when we came round the corner.

　　A. out of sight B. at sight C. by sight D. in sight

　　15. We'll be only too glad to attend your party_____ we can get a baby-sitter.

　　A. so far as B. provided that C. unless D. except that

　　16. They couldn't ____ him of his mistake.

　　A. advise B. convince C. persuade D. believe

　　17. The old gentleman never fails to help_____ is in need of his help.

　　A. whom B. who C. whoever D. whomever

　　18. ______ under a microscope，a fresh snowflake has a delicate six-pointed shape.

　　A. Seeing B. Seen C. To see D. To be seen

　　19. “When are you going to visit your uncle in Chicago？”

　　“As soon as_____ our work for tomorrow.”

　　A. we're plete B. we'd plete C. we'll plete D. we plete

　　20. Neither John nor I _____ able to persuade Richard's grandfather to attend the wedding.

　　A. am B. are C. are to be D. is

　　21. You ought _____ the matter to the manager the day before yesterday.

　　A. to report B. to have reported C. to reporting D. have reported

　　22. We look forward to _____ to the opening ceremony.

　　A. invite B. be invited

　　C. having been invited D. being invited

　　23. Excuse me，but it is time to have your temperature______.

　　A. taking B. taken C. took D. take

　　24. I cannot_____ the truth of your words，although they go against my interests.

　　A. but admit B. but admitting

　　C. help but to admit D. help but admitting

　　25. When I went to visit Mrs. Smith last week，I was told she two days before          .

　　A. has left B. was leaving C. would leave D. had left

　　26. The boat will not arrive____ forty-four hours.

　　A. in B. at C. for D. by

　　27. In winter，animals have a hard time_____ anything to eat.

　　A. to find B. to finding C. to find out D. finding

　　28. Since you won't take advice，there is no_____ in asking for it.

　　A. place B. point C. reason D. way

　　29. _____ is known to all，too much smoking will cause lung cancer.

　　A. That B. It C. As D. What

　　30. They have developed techniques which are _______ to those used in most factories.

　　A. more B. better C. greater D. superior

　　参考答案：unit 13

　　1—10 ABCDA DCCBD 11—20 DCDDB BCBDA

　　21—30 BDBAD ADBCD

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