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    精英家教网 > 高中英语 > 题目详情
    His sister left home in 1998，and ________ since.
    A．had not been heard ofB．has not been heard of
    C．had not heard ofD．has not heard of
    B
    首先观察四个选项的特点：从语态来看，两个选项使用了主动语态，两个选项使用了被动语态，优先考虑出题者是否想要考查被动语态。主语His sister与hear of之间是动宾关系，因此判定此题考查被动语态。结合句意“他的妹妹1998年离开家，然后就一直杳无音讯”以及时间标志词“since”可知，此处应使用现在完成时的被动语态。
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