Sir，you________sit here．It's for women and children only．A.don'tB.can'tC.won'tD.needn't
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B解析分析：句意是“先生，你不可以坐在这里，这里是给妇女和儿童坐的。”所以此处表达的是“不允许”的概念。(题型变化)You can't sit here．＝You may not sit here．＝You mustn't sit here．＝You are not allowed to sit here．＝Don't sit here．