摘要：(二)作无人称代词 it作无人称代词时.除了句中找不到它所代表的词语外.另一个特点是它后面的内容都是表示天气.时间.距离.度量衡及情况等. It is fine . It is noon. It is a half hour’s walk to the factory. It is eighteen square metres in area. What does it matter?

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