阅读理解
There were many mice(老鼠) in Jack's house. They ran about all over the house at night. In the day,
they were back to their homes.
"I need a good cat," thought Jack. He knew a man who had cats, so Jack went to see him.
"Do you have a cat that is good for the mice?" Jack asked the man.
"Well, yes, I have such a cat," answered the man.
"I'll take it," said Jack. He paid for the cat and took it home.
A week later, Jack went back to the man with the cat in his hand. "My house has more mice now than before," Jack said angrily. "The cat you sold me doesn't want to catch them at all. But you said it was good for the mice." "That's right," said the man. "It is good for the mice. Come to think about it - it is good for
the mice!"
1. ________ worried Jack a lot.
A. A man
B. A cat
C. The mice
D. The house
2. Jack bought a cat from ________.
A. a friend
B. the market
C. a neighbor
D. a man
3. After the cat came to Jack's home, there were ________ in his house.
A. more mice
B. fewer mice
C. no mice
D. more cats
4. What did the man mean (意思是)by saying "It is good for the mice"?
A. Be kind to the mice.
B. Be angry with the mice.
C. Be good at catching the mice.
D. Be worried about the mice.
角，如图所示，则圆盘的转速是_______________。 