Today Newton is a very clean place. Many years ago, however, there were milli...

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问题 Today Newton is a very clean place. Many years ago, however, there were millions of rats in it. They attacked the cats and dogs. Sometimes a great number of them knocked down a man or woman walking home at night. The rats were very large in size and they harmed many people.
They goverment ordered everybody to kill rats. Most people were lazy, so they didn’t kill many. The goverment promised to pay some money for each dead rat. The made the people very happy. They killed thousands of rats everyday. A goverment officer put all the dead rats in a big pile. Sometimes a man brought hundreds in one day.
After two weeks there were not many rats in the city, but people still brought many rats to the goverment office. The goverment officer thought that people were stealing dad rats from the pile. He ordered his mean to dig a deep hole and put the rats in it. Soon there were no mroe rats, and the goverment didn’t pay any more momey.

选项 4、A deep hole was dug so that______.
A. the rats couldn’t come out to attack people at night
B. people could take rats from it easily
C. people would kill more rats
D. nobody could take any rats from the pile

答案D

解析挖深坑的目的的是...。没有人能从死老鼠堆里拿走老鼠。
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