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    精英家教网 > 高中英语 > 题目详情
    18．Which of the following sentences conveys a fact？（　　）
    A．Mary and her son must be home by now．
    B．Careless reading must give poor results．
    C．It's getting late，and I must leave now．
    D．He must be working late at the office．

    分析 下面哪个句子表达了一个事实？
    C 很晚了，我必须走了．

    解答 答案是C．考查虚拟语气：must表示"必须"指事实；而如果表示推测，则是肯定的推测，不一定是事实．A Mary和她的儿子现在一定在家；B 粗心阅读一定会有很差的结果；C 很晚了，我必须走了；D 他一定在办公室工作得很晚．选项C表示"很晚了，我必须走了．"表达的是一种事实，故选C．

    点评 解答此类题目，首先要掌握西方文化及英语日常用语，然后结合语境及相关语法选择合适的交际用语．

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