THE TERM ‘TOOTH DECAY’ REFERS TO THE____________ .A. DIGESTION OF...

50. The term ‘tooth decay’ refers to the____________ .

a. digestion of the food

b. conversion of the sugar

c. production of the acid

d. dissolution of the enamel

IV. WRITING

(51-55). Choose the sentence (a, b, c or d) that is almost the same in meaning as the

sentence given.