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    精英家教网 > 高中英语 > 题目详情
    Jack doesn’t smoke now, but he ______________ for almost twenty years.
    A．was smokingB．smokedC．has smokedD．had smoked
    B
    考察时态。本题容易错选C。实际上本题是描述在过去20年中所发生的事情，并不强调对现在的影响，故使用过去时就可以了，强调过去和现在的对比。句意：Jack现在不抽烟，但是他抽了几乎20年的烟。
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