–Does your father smoke?--_________,it’s 2 years since he __________.A.Yes; smoked B.No; smoked C.Yes; smokes D.No; has smoked这题选B,这是为什么呢?

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–Does your father smoke?--_________,it’s 2 years since he __________.A.Yes; smoked B.No; smoked C.Yes; smokes D.No; has smoked这题选B,这是为什么呢?
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–Does your father smoke?--_________,it’s 2 years since he __________.A.Yes; smoked B.No; smoked C.Yes; smokes D.No; has smoked这题选B,这是为什么呢?
–Does your father smoke?--_________,it’s 2 years since he __________.
A.Yes; smoked B.No; smoked C.Yes; smokes D.No; has smoked
这题选B,这是为什么呢?

–Does your father smoke?--_________,it’s 2 years since he __________.A.Yes; smoked B.No; smoked C.Yes; smokes D.No; has smoked这题选B,这是为什么呢?
B
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(见后面解释)”_.意思就一致了.
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.
请及时采纳,不懂继续问

it's three years since he was a university=graduated from the university

如果选B这道题翻译后是这样的:
—你的爸爸抽烟吗?—不,他抽烟已经两年了。
而这样是错误的,所以这道题应选A,翻译后为:
—你的爸爸抽烟吗?—是的,他抽烟已经两年了。