题目内容：

When I was a small boy, something happened to me that made me never put any wild creature in a cage.

We lived near a forest, and every evening the mockingbird would come and_______. I decided to catch a young   _____and keep it in a cage, and in this way, I would have my own private musician. Then I succeeded in catching one and put it in a cage. At first, the bird was_______, so it fluttered (扑腾) in the cage. But finally it was used to living in its new home. I felt very excited with myself and ______ some beautiful singing.

On the second day, the little bird’s mother flew to the cage with_______ in her mouth. The baby bird ate everything. I was ______ to see this. Certainly the mother bird knew how to feed her baby better than I did.

The following morning when I went to see my bird, I found it ______on the floor of the cage. I was terribly surprised and sad! What had happened?

Arthur Wayne, a famous biologist, happened to ______ my father at that time. After she knew my story, she explained to me, “A mother mockingbird, finding her young in a cage, will______ bring it poison berries. She thinks it better for her baby to die than to lose_______.”

Since then I have never caught any living creature and put it in a cage. All living things have a right to live free.

1.A. dance    B. fly    C. sing    D. jump

2.A. bird    B. boy    C. fish    D. thief

3.A. happy    B. careful    C. active    D. afraid

4.A. looked forward to    B. looked out of    C. looked for    D. looked up

5.A. water    B. food    C. songs    D. stones

6.A. worried    B. pleased    C. bored    D. tired

7.A. alone    B. alive    C. dead    D. sick

8.A. invite    B. visit    C. challenge    D. introduce

9.A. never    B. seldom    C. sometimes    D. ever

10.A. friends    B. parents    C. freedom    D. happiness