In order to avoid fires or explosions.people not use mobile phones at gas stations．( )A．mayB．mustC．shallD．need 题目和参考答案——青夏教育精英家教网——

题目内容

8．In order to avoid fires or explosions，people ________ not use mobile phones at gas stations．（　　）

A．

may

B．

must

C．

shall

D．

need

分析为了避免火灾或爆炸，人们不得在加油站使用手机．

解答答案：B may not 不可以；shall not不准许 need not不需要，不必要；must not禁止；根据常识及题意得知，加油站里是严令禁止使用手机的．故选B

点评本题考查的是must（必须）的否定形式：mustn't表示禁止，不允许的意思．

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