Of all man’s natural enemies, the one that has caused him more trouble than any other must be the common rat. For centuries, man has been  21  to solve the problem of rats. The ancient Egyptians were probably the first people to try to  22  them with poison, and this method is still being used today. This says a great deal about how  23  this method has been. We have set innumerable  24  , from simple wires to  25  machines that drowned the rats in beer! We have tried to inflect them with  26  developed germs. We’ve  27 tried to raise super cats to kill them. However, we are still losing the  28  .

So why can’t man manage to  29  a mere animal like the rat? The answer is simply that the rat isn’t a mere animal; It is a very special kind of animal. An average rat  30  : wriggle through a hole no  31  than a $1 coin; climb a brick wall as if it were climbing steps; happily leave a building by being flushed down the toilet, and then return the same  32  ; jump from a fifth storey window and run away  33  ; and last but certainly not least ,  34  so rapidly that a single pair could have 15,000 babies in one year!

35  all these phyical qualities, we also have the  36  that rats are rather good at not getting caught. They seem to have an almost supernatural ability to  37  when food has been poisoned and a suspicious rat will starve  38  it eats poisoned food. They also seem to be able to  39  a trap with no real difficulty.

One thing looks certain, we had better find a way to  40  these small brown creatures soon, or it may be too late.

21. A. Trying 

B. managing

C. coming 

D. failing

22. A. solve

B. drive

C. kill

D. murder

23. A. effective

B. efficient 

C. explicit

D. extreme

24. A. troops

B. tricks

C. tires

D. traps

25. A. commercial 

B. complicated

C. conventional

D. contemporary

26. A. secretly 

B. especially

C. specially

D. separately

27. A. ever 

B. never

C. just 

D. even

28. A. competition 

B. companion 

C. battle

D. challenge

29. A. Overcome

B. hunt

C. grasp

D. interrupt

30. A. should

B. can 

C. must

D. may

31. A. larger

B. smaller 

C. less 

D. more

32. A. method 

B. way 

C. means

D. road

33. A. harmed 

B. unharmed

C. brave

D. clumsy

34. A. adopt

B. grow

C. multiply 

D. accelerate

35. A. In spite of

B. Owing to

C. In addition to

D. At the mercy of

36. A. phenomenon

B. problem

C. principle

D. privilege

37. A. touch

B. taste

C. feel 

D. sense

38. A. after 

B. when

C. since

D. before

39. A. realize

B. recognize 

C. ruin 

D. rewind

40. A. win

B. hit 

C. strike

D. defeat

21. A  22. C  23. A  24. D  25. B  26. C  27.D  28. C  29. A  30. B

31. A  32. B  33. B  34. C   35. C  36. B  37. D  38.D  39. B  40. D

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Of all man’s natural enemies, the one that has caused him more trouble than any other must be the common rat. For centuries, man has been  21  to solve the problem of rats. The ancient Egyptians were probably the first people to try to  22  them with poison, and this method is still being used today. This says a great deal about how  23  this method has been. We have set innumerable  24  , from simple wires to  25  machines that drowned the rats in beer! We have tried to inflect them with  26  developed germs. We’ve  27 tried to raise super cats to kill them. However, we are still losing the  28  .

So why can’t man manage to  29  a mere animal like the rat? The answer is simply that the rat isn’t a mere animal; It is a very special kind of animal. An average rat  30  : wriggle through a hole no  31  than a $1 coin; climb a brick wall as if it were climbing steps; happily leave a building by being flushed down the toilet, and then return the same  32  ; jump from a fifth storey window and run away  33  ; and last but certainly not least ,  34  so rapidly that a single pair could have 15,000 babies in one year!

35  all these phyical qualities, we also have the  36  that rats are rather good at not getting caught. They seem to have an almost supernatural ability to  37  when food has been poisoned and a suspicious rat will starve  38  it eats poisoned food. They also seem to be able to  39  a trap with no real difficulty.

One thing looks certain, we had better find a way to  40  these small brown creatures soon, or it may be too late.

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22. A. solve            B. drive            C. kill              D. murder

23. A. effective         B. efficent          C. explict           D. extreme

24. A. troops           B. tricks            C. tyres            D. traps

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26. A. secretly          B. especially        C. specially         D. separately

27. A. ever             B. never           C. just             D. even

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29. A. Overcome        B. hunt            C. grasp            D. interrupt

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32. A. method          B. way             C. means           D. road

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38. A. after             B. when           C. since            D. before

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Of all man’s natural enemies, the one that has caused him more trouble than any other must be the common rat. For centuries, man has been   1   to solve the problem of rats. The ancient Egyptians were probably the first people to try to   2   them with poison, and this method is still being used today. This says a great deal about how   3   this method has been. We have set innumerable   4  , from simple wires to   5   machines that drowned the rats in beer! We have tried to infect (感染) them with   6   developed germs. We’ve   7   tried to raise super cats to kill them. However, we are still losing the   8  .

So why can’t man manage to   9   a mere animal like the rat? The answer is simply that the rat isn’t a ‘mere’ animal; it is a very special kind of animal. An average rat   10  : wriggle through a hole no   11   than a $ 1 coin; climb a brick wall as if it were climbing steps; happily leave a building by being flushed down the toilet, and then return the same   12  ; jump from a fifth storey window and run away   13  ; and last but certainly not least,   14   so rapidly that a single pair could have 15,000 babies in one year!

  15   all these physical qualities, we also have the   16   that rats are rather good at not getting caught. They seem to have an almost supernatural ability to   17   when food has been poisoned and a suspicious rat will starve   18   it eats poisoned food. They also seem to be able to   19   a trap with no real difficulty.

One thing looks certain, we had better find a way to   20   these small brown creatures soon, or it may be too late.

1．A．trying                   B．managing             C．coming               D．failing

2．A．solve                    B．drive                   C．kill                      D．murder

2,4,6
 
3．A．effective               B．efficient               C．explicit                D．extreme

4．A．troops                   B．tricks                  C．tyres                   D．traps

5．A．commercial           B．complicated         C．conventional        D．contemporary

6．A．secretly                 B．especially             C．specially              D．separately

7．A．ever                      B．never                  C．just                     D．even

8．A．competition           B．companion           C．battle                  D．challenge

9．A．overcome              B．hunt                    C．grasp                  D．interrupt

10．A．should                 B．can                     C．must                   D．may

11．A．larger                  B．smaller                C．less                     D．more

12．A．method               B．way                    C．means                 D．road

13．A．harmed               B．unharmed            C．brave                  D．clumsy

14．A．a(chǎn)dopt                  B．grow                   C．multiply               D．a(chǎn)ccelerate

15．A．In spite of           B．Owing to             C．In addition to       D．At the mercy of

16．A．phenomenon        B．problem               C．principle              D．privilege

17．A．touch                  B．taste                    C．feel                     D．sense

18．A．a(chǎn)fter                   B．when                  C．since                   D．before

19．A．realize                 B．recognize             C．ruin                    D．rewind

20．A．win                        B．hit                   C．strike                      D．defeat

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