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    精英家教网 > 高中英语 > 题目详情
    The computer was invented in the 1940’s and ______ quite a lot ever since.
    A．was changedB．had changed
    C．has been changedD．will change
    C

    试题分析：考察时态。本题的关键在于后面的时间状语ever since自从，该短语要和现在完成时连用。句意：电脑是20世纪40年代发明的，从那以后一句发生了很大的改变。故C正确。
    点评：时态题的考查关键是抓住句子的上下文含义和句中的时间状语。要根据时间状语来选择合适的时态，在平时的学习中要注意积累有关时态的用法和各种时态的特殊之处。如since， so far等经常与现在完成时连用。在条件状语从句中用一般现在时代替将来时等等。
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