题目内容
1.Many students come from poor families and they ______ afford school lunches,so the government is trying to help them.( )A. | needn't | B. | shouldn't | C. | can't | D. | mustn't |
分析 很多学生来自贫穷的家庭,他们不能支付学校的午餐,所以政府正在尽力帮助他们.
解答 答案:C mustn't,"不要、不能、禁止";needn't,不必;shouldn't不应该;can't;不能;根据句中信息"Many students comc from poor families"可以推测下句应为:他们不能支付学校的午餐费用;故用can't;故选C.
点评 情态动词不仅有用法上的区别,也有语气上的差异,需要根据语境、结合语法作出正确解答.
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