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_____ is necessary for us to tell him about the result.
A.ThatB.ThisC.ItD.What
C

试题分析:考查it用法。本题的It是形式主语,真正的主语是后面的不定式to tell him about the result.句意:对我们来说,告诉他结果是必要的。故C正确。
点评:在英语中it可以指时间,地点,度量衡等,也可以做形式主语,形式宾语,或者引导强调句型。也可以指代前面提及的同一个人或者事情。要特别模糊it的用法。
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