题目内容：

 

One day the staff members of a zoo called a meeting to discuss the problem — how to deal with the kangaroos that jumped out of the cage. They came to the conclusion(结论) that the cage was placed too low and decided to raise it from one to two meters high. But the next day the kangaroos were still found outside and they again raised the cage to three meters.

Quite unexpectedly the next morning they saw the kangaroos still free to go around. They were alarmed and decided to go to all the length by raising the cage to the height of ten meters.

Later a giraffe, while chatting with some kangaroos, asked them, “Do you think they will go on raising your cage?”

“Hard to say,” said a kangaroo, “if they continue forgetting to lock the cage door.”

1.The staff members keep on raising the cage because_________.

A.kangaroos like to jump high B.they don’t want to lock the cage door

C.kangaroos grow taller and taller D.they find kangaroos outside the cage every morning

2.The underlined word “alarmed” in Paragraph 2 means _________ in Chinese.

A.放松的 B.警觉的 C.害怕的 D.镇定的

3.What do you think of the staff members of the zoo?

A.Careless. B.Hard-working. C.Foolish. D.Understanding.