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    精英家教网 > 高中英语 > 题目详情
    20．-Tom graduated from college at a very young age．
    -Oh，he ________ have been a very smart boy then．（　　）
    A．couldB．shouldC．mightD．must

    分析 ---汤姆很年轻时就大学毕业了．
    ---哦，那他那时一定是个非常聪明的男孩．

    解答 答案是D．考查情态动词的辨析．could 能，会；should 应该；might 也许；must 一定，表示有依据的推测．句意是：---汤姆很年轻时就大学毕业了．---哦，那他那时一定是个非常聪明的男孩．故选D．

    点评 解答此类题目，首先要掌握每个情态动词的用法及区别，然后根据句意选择正确的答案．

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