题目内容

19．-I often mistake Jim for Bob．______ you tell them apart？
-No．They look so much alike．（　　）
A．MustB．ShallC．MayD．Can

分析 --我经常把吉姆误认为鲍勃．你能区分他们吗？
--不能．他们看起来是如此地相像．

解答 答案：D．
can 表示能力；must必须，应该，一定，准是；may表示允许、许可，May I…征询对方许可．shall 1．用于第一、第三人称疑问句中，征求对方的意见和向对方请示．2．用于第二、第三人称陈述句中，表示说给对方的命令、决心、警告、允诺或威胁等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．结合句意"--我经常把吉姆误认为鲍勃．你能区分他们吗？--不能．他们看起来是如此地相像．"可知，这里表示能力，故选D．

点评 本题考查情态动词的用法．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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C．students should be given more freedom in thinking
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