阅读理解
Today Newtown is a very clean place. But many years ago, there were millions of rats(老鼠)in Newtown. They attacked(袭击) the cats and dogs. Sometimes a lot of them knocked down a man or woman walking home at night. The rats were very big in size and they hurt many people.
The government (政府) ordered (命令) everybody to kill rats. Most people were lazy, so they did not kill many. Then the government decided to pay some money for each dead rat. That made the people very happy. They killed thousands of rats every day. A government officer put all the dead rats in a big pile(堆). 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 government office. The government officer thought that people were stealing (偷) dead rats from the pile. He ordered his men to dig a deep hole and put the rats in it. Soon there were no more rats, and the government did not pay any more money.
The rats in Newtown were ________.

A．as big as cats

B．as dangerous as dogs

C．large and many

D．knocked down by the people there

The people killed rats ________.

A．to get some money for the dead bodies

B．because the rats attacked them at night

C．to help the government make the city clean

D．to pay the government as a tax(税)

A deep hole was dug so that ________.

A．the rats could not come out to attack people at night

B．people could take as many rats from the hole as they wished

C．the rats could not run away easily

D．nobody could take any rats from the pile

From the passage we can see that the government officer ________.

A．was a very rich man

B．was clever

C．was afraid of rats

D．liked to live in a clean house

Which of the following is the best title (标题) for this passage

A．How to Kill Rats

B．Newtown - City of Rats

C．How Newtown People Became Rich

D．How Newtown Became a Very Clean Place