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1. Was it a silly thing to do?
2. How many silly poems are in the book?
3. Who asked a silly question?
4. What boys have done a lot?
5. Who never travelled by a plane?
6. Who is naughty?
7. How many years ago it happened?
8. How many times it happened to him?
9. Who he became?
10. When the festival took a place?

1. Isn't it?

2. Aren't it?

3. Didn't she?

4. Aren't they?

5. Didn't he?

6. Aren't you?

7. Isn't it?

8. Didn't it?

9. Isn't he?

10. Didn't it?