Correct the mistakes. • What Tony is writing? • What is writing? • What Julia want to do? • Who does wants a cup of tea? • Who President John F. Kennedy killed? • Who did invented…

Here are the corrected sentences:

1. What is Tony writing?
2. What is he writing?
3. What does Julia want to do?
4. Who wants a cup of tea?
5. Who did President John F. Kennedy kill?
6. Who invented the telephone?
7. Who's your favorite actor?
8. Whose coat is this?
9. What hand do you write with?
10. Arthur is 21, isn't he?
11. You're a student, aren't you?
12. They live in Milan, don't they?
13. Does Diana like golf, does she?

(Note: Sentence 13 is generally not correct in standard English. Typically, you wouldn’t tag a question with another question in this manner. You would just end it after the first part: "Does Diana like golf, does she?")