1. 根据句意，选用方框内所给词组填空。注意形式的变化。

let……down, kick sb. off, be hard on, worry about, even though

1. （1） You don't have to  me. I'm old enough to take good care of myself.

3. （2） Jim is not a good student. He is afraid that his teacher may .

5. （3） Mary failed the exams again. She thought she  her parents once more.

7. （4） "You  yourself. But it's not only your fault," my father told me kindly.

9. （5） "The poor man was very happy  he had nothing.