2. 外语
  3. They first arrived on British ships almost 200 years ago, with the aim of cutting back a rapid growth of rat(鼠) population. Then

They first arrived on British ships almost 200 years ago, with the aim of cutting back a rapid growth of rat(鼠) population. Then

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问题     They first arrived on British ships almost 200 years ago, with the aim of cutting back a rapid growth of rat(鼠) population. Then the cats themselves became the problem. After dealing with the rats, they turned to birds — and now hundreds of them have been killed in a move to protect rare(稀有) birds. Even cat lovers have been persuaded to back the move, after being told that there was no other choice.
   When British sailors took control of Ascension Island in 1815, they found nobody living on it but that it was overrun with rats which had escaped from sinking ships. They introduced cats to kill the rats — and were soon overrun by cats. By 1820 they were sending back to England for dogs to kill the cats, but that didn’t work. Ever since, the wild cat population has been attacking the birds.
   Man introduced these cats, and it has disturbed the balance. Ascension Island is a most important seabird gathering place. We have to undo man’s mistake in bringing cats here. Action has been taken to kill off wild cats for the protection of birds. Only cats raised as pets are allowed. Since they are micro-chipped (加电子芯片), if they get caught they can be sent back to their owner. The action can be considered rather successful. The cat population is down to the last few — they’re the most difficult ones to catch.
What does the author mean by saying "We have to undo man’s mistake in bringing cats here" (Para. 3)?
选项 A、Friendly animals such as dogs should have been introduced.
B、Men should remove the bad effect caused by cats.
C、Man should have a better understanding of cats.
D、Cats are not as valuable as other rare animals.
答案B
解析 词句理解题。短文前面部分说明英国人将猫引进阿森松岛以控制鼠患、但鼠患消除后猫患却生的情况，而后面部分则说明人们为应对猫患、保护海鸟而采取的措施，这一句话出现在Action has been taken... 之前，起的是承上启下的功能，由此可知，其中的mistake一词指的就是将猫引进该岛从而造成猫患这个“错误”，而undo本义指“清除，消除”，所以这一句的意思就是人类应当消除猫类所造成的不良影响，这与[B]的意思是一致的。事实上，该项中的remove对应的就是undo一词。
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