问题描述：
Since you kinow smoking is bad for you,__get rid of this bad habit?
这句话的答案为何是A,而不用C,能不能说原因?
A.why not B.what abou C.why don't D.how to
这句话的答案为何是A,而不用C,能不能说原因?
A.why not B.what abou C.why don't D.how to
问题解答：
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