Fill in the blanks with appropriate indefinite pronouns.

Here are the indefinite pronouns for each blank:

1. All men subject to error.
2. You have given an example. Can you give another?
3. You can buy this book from any shop.
4. The subject is easy. Anyone can learn it.
5. The situation is uncertain. Anything might happen.
6. No one but the rich can afford a car.
7. There is something you can do to help.
8. Someone must have taken my pen.
9. We must do something to improve our English.
10. Everything went according to plan.
11. He gave someone an apple.
12. You still haven't told me anything.
13. Won't anyone help me?
14. Look out of the window and tell me if you see anything.
15. Doesn't anyone agree with me?