—Ican’tstopsmoking,doctor.   —Foryourhealth,I’mafraidyo...

问题详情：

—I can’t stop smoking, doctor.

    —For your health, I’m afraid you _________.

A. must       B. can        C. have to      D. need

【回答】

C

知识点：情态动词

题型：选择题