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    精英家教网 > 高中英语 > 题目详情
    He collected information on 1,000 people, whose IQ       when they were ten years old.
    A．is testedB．has testedC．would testD．had been tested
    D
    考查时态。根据句意可知这1000人被测量IQ的动作发生在他收集信息collect information该动作之前，故选择过去的过去，即过去完成时。
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