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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 ---索菲婭剛剛描述了事故的每一個細節(jié)．
---她的記憶一定完全恢復(fù)，那么？

解答 答案：D．
根據(jù)上文句意"索菲婭剛剛描述了事故的每一個細節(jié)"可知"她的記憶一定完全恢復(fù)．這里考察的是表示肯定的推測的情況．must必須，偏偏，表推測時，意為"一定是、準是"；shall 1．用在問句中表示征求對方意見，主要用于第一、第三人稱．2．用于陳述句中的第二、第三人稱，表示說話人的意圖、允諾、警告、命令、決心等．3．用在條約、規(guī)章、法令等文件中表示義務(wù)或規(guī)定，一般用于第三人稱；might 或許，可能，可以；could是"can"的過去式，能夠，打算，通常用于假設(shè)語氣的條件句和虛擬語氣的主句中．在這四個詞中must所表示可能性最大，故選D．

點評 本題考察情態(tài)動詞的用法．要理解句意，掌握好各個情態(tài)動詞的用法．充分利用語境，注意分清各個情態(tài)動詞適用的句型，得出答案．

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