一、用所给词的适当形式填空。(10)

1．Kangaroos are ______ (play) and chimpanzees are _____ (noise).

2. I was ____ (surprise) to find hardly anyone in the zoo.

3. Visiting zoos are like ____ (live) textbooks for young people.

4. He  ____ (use) to be ____ (call) “Little Tiger”.

5. Liu Xiang’s success is an ____（inspire）to us all