Sửa lại:
1. Woud you like to go sailing ?
2. Are you a student here ?
3. How many cakes have you eaten ?
4. I'm too impatient, aren't I?
5. Did you enjoy your trip ?
6. Where have your friends gone ?
7. Does Peter play tennis?
8. Don't drop those plates, can you?
9. It's rained hardly at all this summer, has it?
10. What has happened ?