If you stop smoking, you can only expect to have a bad cough.
A. won’t
B. would not
C. do not
D. can not
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(答案→)A. won’t
B. would not
C. do not
D. can not
解析:will除了用作表示将来时的助动词外,还可用来强调愿意或不愿意。又如:If you will/would wait a moment,1 will fetch the money。但是在表示不肯或不愿意时,则只能使用won't,不能使用would not。