10．A good rest between classes______ recover brain power to its best and make us perform better in class later．（　　）
A．canB．mustC．needD．shall

分析 課間好好休息可以使大腦能力恢復(fù)到最佳狀態(tài)并且使我們在后來的課堂上表現(xiàn)得更好．

解答 答案：A．
can 表示能力；must必須，應(yīng)該，一定，準(zhǔn)是；need 需要，必要；shall 1．用于第一、第三人稱疑問句中，征求對方的意見和向?qū)Ψ秸埵荆?．用于第二、第三人稱陳述句中，表示說給對方的命令、決心、警告、允諾或威脅等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．結(jié)合句意"課間好好休息可以使大腦能力恢復(fù)到最佳狀態(tài)并且使我們在后來的課堂上表現(xiàn)得更好．"可知，這里表示能夠，所以can符合語境，故選A．

點評 本題考查情態(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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