A.His bad habit | B.His bad teeth |
C.Not smiling | D.Eating too much sugar |
A.they don’t like smiling |
B.they think they are ugly |
C.their teeth are not beautiful |
D.they can’t open their mouths |
A.A dentist can tell you how to improve your bad teeth. |
B.A dentist can help you to take care of your bad teeth. |
C.A dentist can tell you how to brush your teeth. |
D.Both A and B |
A.not smile often |
B.laugh all the time |
C.neither smile nor laugh |
D.smile and even laugh often |
A.Either 20 or 30 times a day |
B.Between 7 and 15 times a day |
C.Around 30 times a day |
D.Only 30 times a day |