MUST THE DECAYING TOOTH COME OUT

39. - 3500 CAU TRAC NGHIEM ON TAP AV THCS
3500 CAU TRAC NGHIEM ON TAP AV THCS

39. Must the decaying tooth come out?

a. Yes, it must

b. No, it mustn't

c. No, it needn't

d. a and c are correct

 d