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.
