Write the word according to the meaning of the sentence.

1. Children like to take part in all kinds of a__________ after class.

2. I b__________ you can make it as long as you work hard enough.

3. Good hobbies can d__________ our interests.

4. I'm so shy a girl that I'm afraid to speak to f__________.

5. — He looks upset. What has h__________ to him?

    —He lost his Hongbao, which contained 1000 yuan lucky money.

6. Don't open that envelope. It's a p__________ letter.