_____ suddenly occurred to me _____ I had to attend an important meeting in Shan
题型：不详难度：来源：
_____ suddenly occurred to me _____ I had to attend an important meeting in Shanghai the next day.| A．It; which | B．What; that | | C．What; which | D．It; that |
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答案
| D |
解析
试题分析：考察it作为形式主语。本句指的it是形式主语，真正的主语是后面的that引导的主语从句，that在主语从句中不充当任何成分，只起引导和连接作用。本句中还有固定句式It occur to sb that…某人突然想起某事；句意：我突然想起我明天要去上海参加一个重要的会议。故D正确。
点评：形式主语，顾名思义，即形式上是主语，但实际上不是真正的主语，真正的主语是后面的动词不定式、动名词或主语从句等。如果让后面的动词不定式、动名词或主语从句用作主语，那么在句式上容易造成“头重脚轻”，句式不平衡，故往往用it作形式主语，而把真正的主语放在后面。it在这里没有任何意义。 |
举一反三
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