đây nha bn
2. Why does Simon have a lot of pain now?
3. How did you feel after eating that food?
4. When did Nga do last week
5. Who will check your teeth ?
6. How long did it take Dr Phong to fill Van's tooth ?
7. Where is your brother going to?
8. What did Mr Cuong do at 5.30 yesterday?
9. Whose letter did Hoa receive five days ago?
10. How many students are there in Lien's class having toothache?