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.
Which of the following first came to the island?

选项 A、The cats from England.
B、The rats.
C、The sailors from England.
D、The birds from England.

答案B

解析 细节题。短文第二段第一句指出:When British sailors... it was overrun with rats...即英国水兵占领阿森松岛后,发现岛上只有老鼠,这些老鼠是从沉船上逃到岛上的。因此,老鼠先于水兵和猫到达该岛。至于鸟类,短文并未提及它们是什么时候到达岛上的,选项中的from England也不对。
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