—Does your father smoke?— it's 2 years since heA. Yes; smokedB. No; smokedC. Yes; smokesD

问题补充：

—Does your father smoke?

—,its 2 years since he．

A. Yes; smoked

B. No; smoked

C. Yes; smokes

D. No; has smoked

答案：

A. Yes; smoked

(答案→)B. No; smoked

C. Yes; smokes

D. No; has smoked

解析：考查情景交际：先看第二空since后面用过去时，排除CD，问句：你爸爸抽烟吗？答语， No, 表示“不抽烟”，这和 it’s 2 years since he smoked “他已经两年没抽烟了”意思就一致了。因为在It.....since.... 句型中，如果since 从句是延续性动词，就得从延续性动词所表动作结束的时候算起。选B。