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–I can’t stop smoking, doctor.
--For your health, I’m afraid you________.
A.mayB.needC.mustD.have to
D

试题分析:句意:医生,我戒不了烟。从你的健康考虑,我想你必须戒掉。may表示“或许,可能”,need表示“需要”,must强调主观上的必须,而have to强调客观上的不得不,在这里是医生交代病人客观原因要求他必须戒烟,而不管他主观上愿不愿意;故选D。
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