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    7．-Sophia described every detail of the accident just now．
    -Her memory ______ be completely back，then？（　　）
    A．shallB．mightC．couldD．must

    分析 ---索菲娅刚刚描述了事故的每一个细节．
    ---她的记忆一定完全恢复，那么？

    解答 答案：D．
    根据上文句意"索菲娅刚刚描述了事故的每一个细节"可知"她的记忆一定完全恢复．这里考察的是表示肯定的推测的情况．must必须，偏偏，表推测时，意为"一定是、准是"；shall 1．用在问句中表示征求对方意见，主要用于第一、第三人称．2．用于陈述句中的第二、第三人称，表示说话人的意图、允诺、警告、命令、决心等．3．用在条约、规章、法令等文件中表示义务或规定，一般用于第三人称；might 或许，可能，可以；could是"can"的过去式，能够，打算，通常用于假设语气的条件句和虚拟语气的主句中．在这四个词中must所表示可能性最大，故选D．

    点评 本题考察情态动词的用法．要理解句意，掌握好各个情态动词的用法．充分利用语境，注意分清各个情态动词适用的句型，得出答案．

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