How often does Minh brush his teeth
Why Simon is in a lot of pain
How did you felt after aeting that food
When did Nga go to see the dentist
Who will check your teeth
How long did it take Dr. Phong to fill Van's tooth
Where is your brother going to
What did mr. Cuong do at 5.30 yesterday
Who's letter did hoa receive 5 days ago
How many students are there in lien's class having toothache