1. Minh brushes his teeth (twice a day).

→ How often does Minh brush his teeth?

2. Simon is in a lot of pain now (because he has a toothache).

→ Why is Simon in a lot of pain now?

3. I felt (sick) after eating that food.

→ How did you feel after eating that food?

4. Nga went to see the dentist (last week).

→ Did Nga go to see the dentist?

5. (Dr Lai) will check your teeth.

→ Who will check my teeth?

6. It took Dr Phong (10 minutes) to fill Van’s tooth.

→ How long did it take Dr Phong to fill Van’s tooth?

7. My brother is going to (the hospital).

→ Where is your brother is going to?

8. Mr. Cuong (did morning exercises) at 5.30 yesterday.

→ What did Mr. Cuong do at 5.30 yesterday?

9. Hoa received her aunt’s letter (five days ago).

→ When did Hoa receive her aunt’s letter?

10. There are (twelve) students in Lien’s class having toothache.

→ How many students are there in Lien’s class having toothache?