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My hometown ______ a lot  in the past ten years.
A.changeB.changedC.has changedD.is changing
C

试题分析:现在完成时用来表示之前已发生或完成的动作或状态,其结果的确和现在有联系。动作或状态发生在过去 但它的影响现在还存在;也可表示持续到现在的动作或 状态。其构成: have (has) +过去分词。根据语境可知此句的含义是我的家乡近十年发生了很多的变化,因主语是my hometown是单数,故用助动词has+过去分词,故选C.
点评: 此题的关键是时间状语in the past ten years表示在近十年是现在完成时的标志词。注意现在完成时和一般过去时两种时态的区分
(1)一般过去时的谓语动词用过去式,而现在完成时的谓语基本构成是"助动词have /has +过去分词"。 (2)一般过去时通常与表示过去的时间状语连用。如:yesterday, last week, two years ago, just now, in 2002等; 而现在完成时则常与just, already, ever, never等副词和these days, this week, since..., for...等表示一段时间的状语连用。
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