You must stop ( ),because it is bad for yourYou must stop ( ),because it is bad for your health.a.to smokeb.smokec.to smokingd.smoking正确答案是D,为什么?还有为什么不可以选C?

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You must stop ( ),because it is bad for yourYou must stop ( ),because it is bad for your health.a.to smokeb.smokec.to smokingd.smoking正确答案是D,为什么?还有为什么不可以选C?
You must stop ( ),because it is bad for your
You must stop ( ),because it is bad for your health.
a.to smoke
b.smoke
c.to smoking
d.smoking
正确答案是D,为什么?还有为什么不可以选C?

You must stop ( ),because it is bad for yourYou must stop ( ),because it is bad for your health.a.to smokeb.smokec.to smokingd.smoking正确答案是D,为什么?还有为什么不可以选C?
stop+doing …是固定用法

stop doing sth 停止正在做的事
答案D

smoking是一种状态