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阅读下面的短文,掌握其大意,然后从下列各题所给的四个选项(A、B、C和D)中,选出最佳选项,并在答题纸上将该项涂黑。

Animals perform many useful and amusing jobs. Dogs are particularly valuable in guiding the blind, 31  property(财产), finding 32  people, and hunting criminals(犯人). Horses are used in guarding herds(牧群),carrying men in lands where there are no roads, and helping farmers work their land. Pigeons(鸽子)33  to carry messages. Wild animals from the jungles, forests and seas are very popular performers in 34  and motion pictures(电影). People realize that, 35  animals may not have the same intelligence(智慧) as 36 , they are clever enough to learn certain things.

The first thing a dog is taught is to37 . It should not38too 1ong for him to learn commands. Simple orders, such as “sit, lie down,stay there, come here, ” can39 be taught by a child.

Training a dog to be a watchdog often produces unexpected results. Some dogs quickly learn the difference 40  unwanted people and friends. This is 41  their masters welcome friends and invite them into their houses. However, some dogs will always 42  the postman who comes to 43  letters. One explanation for this behavior is that, although the postman comes to the house often, he never 44  the house. Therefore, the dog thinks the postman is someone 45  is not wanted, but keeps 46  back anyway.

Dogs are extremely useful as 47  for blind people. When a dog has been properly trained, he will lead his blind master in the right direction and keep him 48 danger. For example, seeing eye dogs 49   a busy road when cars are coming,   50  their masters command(命令) them to do so.

1. A. saving        B. helping          C. making           D. protecting

2. A. lost          B. losing           C. loss             D. missed

3. A. have long used                        B. have long been used

C. have long been using                  D. are long being used

4. A. cinemas       B. theatres        C. museums          D. circuses(马戏团)

5. A. although      B. as               C. since            D. because

6. A. children          B. human being          C. human beings    D. students

7. A. obey          B. order            C. do               D. study

8. A. spend         B. take             C. use              D. want

9. A. still         B. though               C. enough           D. even

10. A. from             B. between          C. among            D. with

11. A. because of       B. due to               C. why              D. because

12.A. beat              B. protest          C. attack           D. eat

13. A. deliver          B. give             C. post             D. fetch

14. A. enters       B. enters into          C. gets                 D. arrives to

15. A. he           B. who              C. whom             D. which

16. A. come         B. to come          C. from coming      D. coming

17. A. companies   B. companions(同伴)   C. men            D. colleagues(同事)

18. A. out from         B. out              C. out of           D. out by

19. A. learn never to across                    B. learn to never cross

C. never learn to cross                      D. learn never to cross

20. A. even         B. if               C. even if              D. because

高一英语完型填空中等难度题

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