题目内容
13．This library ___ten years ago．（ ）| A． | build | B． | built | C． | is built | D． | was built |
分析 这个图书馆建于10年以前．
解答 答案：D．
根据语境推测句意是"这个图书馆建于10年以前．"句子表述的是过去的事情，判断句子中的谓语动词用一般过去时，主语This library 是动作build的承受者，所以用被动语态，一般过去时被动语态的构成是：主语+was/were+动词的过去分词，故选D．
点评 本题考查时态和语态．每个时态都有标志词，熟记这些标志词是做题的关键．在没有时间状语的情况下可以根据语境来对时态做出判断．判断语态的关键则是观察主语是谓语动词的执行者还是承受者．
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