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Question 26: Good teeth help us .
... our food. *
1 điểm
A. be nice
B. have good eyesight
O C. chew
O D. be important
Question 27: When food and germs collect in a small crack, our teeth
1 điểm
O A. become hard
O B. send poison into the blood
C. begin to decay
D. make us feel quite ill
Question 28: A lot of people visit the dentist only when
1 điểm
O A. their teeth grow properly
O B. they have holes in their teeth
C. they have toothache
C. they have brush their teeth