MUST THE DECAYING TOOTH COME OUT

27. - DE THI TIENG ANH CONG CHUC QUANG NGAI 2017 CO DAP AN VA GIAI THICH CHI TIET FULL 3 PHAN
DE THI TIENG ANH CONG CHUC QUANG NGAI 2017 CO DAP AN VA GIAI THICH CHI TIET FULL 3 PHAN

27. 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