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    精英家教网 > 高中英语 > 题目详情
    17．While by school rules high school students _________ use cell phones in the school，they can use public phones to keep in touch with friends and family．（　　）
    A．mustn'tB．shan'tC．wouldn'tD．mightn't

    分析 虽然根据学校规定高中学生在学校不允许用手机，他们可以用公共电话与朋友和家人保持联系．

    解答 答案是B．本题考查情态动词shall的用法．情态动词shall常常用来表示法律或条文的规定．根据句意可知，学校的规定属于条文的规定，所以本题答案选择B．

    点评 要在正确理解情态动词的基本含义的基础上，整体理解语境中的情感态度，做出合理的判断．

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