用所给词的适当形式填空。

1. Many teenagers have _____ (hobby).

2. Our son needs to be _____ (real).

3. He wants to be a _____ (profession) athlete.

4. All parents worry about their _____ (child) success.

5. I'm serious about _____ (run).

6. I should be allowed to make a _____ (decide) for myself.

7. _____ (be) a professional runner is the only thing I have ever wanted to do.

8. My parents have _____ (teach) me the _____ (important) of working hard.