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    19．A lot of tents，drinking water and food __________ to the homeless earthquake survivors in the past several weeks．（　　）
    A．are sentB．were sentC．have been sentD．had been sent

    分析 在过去的几周里，大量的帐篷，饮用水和食物已经被送给了那些在地震中无家可归的幸存者．

    解答 答案：C．根据主语A lot of tents，drinking water and food 和谓语动词send的含义可以看出它们之间是被动关系，又根据时间状语 in the past several weeks可以知道应该用现在完成时态，所以选择C．

    点评 考查现在完成时被动语态．
    现在完成时被动语态强调一个发生在过去的被动性动作，它有两层意思：1）动作已经完成，强调对现在造成的影响或结果：2）主语与谓语动词之间为被动关系．

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