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--What’s this in English?
---_____ a bike.
A.Here isB.It’sC.ItsD.This’
B

试题分析:句意:这个用英语怎么说?它是一辆自行车。it人称代词,指代物多用于指单数,表特指。故选B.
点评:It用作实词,表达以下概念:指代前文提到的事物,前文中的this, that;替代前文中的内容;指代一位性别不明的小孩或未知的人;指代未指明但谈话双方都知道的那件事;指代时间、天气、气候、距离等自然现。除此之外,It常用作形式主语,替代作主语的从句、动词不定式、动名词,而把真正作主语的从句、动词不定式、动名词置于句尾。
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