—I can’t stop smoking doctor.— For your health I’m afraid you . A. mayB. canC. have toD.

问题补充：

—I can’t stop smoking, doctor.

— For your health, I’m afraid you .

A. may

B. can

C. have to

D. need

答案：

A. may

B. can

(答案→)C. have to

D. need

解析：句意：我不能戒烟，医生。为了你的健康，恐怕你必须戒烟。have to不得不，必须，故选C