16. Having healthy teeth is________

A. bad B. important C. interesting D. unimportant

17. When food and germs collect in a small crack, our teeth________

A. become hard B. send poison into the blood

C. begin to decay D. make us feel quite ill

18. Good teeth help us ________ our food.

A. have B. drink C. chew D. give

19. It is a good idea to eat ________.

A. healthy food. B. unhealthy food. C. junk food D. fastfood

20. A lot of people visit the dentist only when_________.

A. their teeth grow properly B. they have holes in their teeth

C. they have toothache C. they have brush their teeth

21. We ought to clean our teeth________.

A. After breakfast B. before breakfast

C. before bedtime D. Both A &C

22. We shouldn’t eat a lot of ________

A. red rice B. fresh fruit C. fish D. chocolate

23. Eating chocolates, sweets, biscuits and cakes between meals is________to our teeth.

A. harmful B. good C. nice D. necessary