By the first day of August, 2007, the PLA for eighty years.A．foundedB．has foundedC．has been foundD．had been founded 题目和参考答案——青夏教育精英家教网—

题目内容

By the first day of August, 2007, the PLA ________ for eighty years.

A．founded	B．has founded
C．has been found	D．had been founded

解析试题分析：句意：到2007年八月的第一天，中国人民解放军已经建立了八十年了。结合语境可知本句描述的是过去某时之前已经完成的动作，故用过去完成时态。主语是被建立的对象，故用被动语态，选D。
考点：时态及语态
点评：英语中的时态主要是借助于时间状语与上下文语境来进行判断。解答此类题型，首先要注意句子中的时间状语，如果没有则要通过分析上下文，结合语境来判断句子的时态。语态的判断主要是确定句子主语与谓语动词的关系。如果是主动关系则用主动语态，反之如果是动宾关系，则用被动语态，尤其要注意一些特殊动词的用法。

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