Question

7. ―Does your father smoke?

―    ，it's two years since he .

A. Yes; smoked      B.  No; smoked

C. Yes; smokes       D.  No; has smoked

Answer 1

7.    B考查动词的时态。句意："你父亲吸烟吗？""不吸了。他不吸烟两年了。"此处smoke是短暂动词，since后接短暂动词，表示从动作结束时算起。