题目

______ is our belief that improvements in health care will lead to a stronger, more prosperous economy. A．Which                   B．What                      C．It                           D．As 答案：C 【解析】 考查it的用法。句意：医疗保健的进步将促进一个更强大、更繁荣的经济，这是我们的信念。that引导的是主语从句，故空格处应该用it作形式主语，代替真正的that引导的主语从句。故选C。 【名师点睛】 It作形式主语代替主语从句，主要是为了平衡句子结构，主语从句的连接词没有变化。 2.用it 作形式主语代替主语从句的结构 (1)It is ＋名词＋从句 It is a fact that … 事实是… It is an honor that …非常荣幸 It is common knowledge that …是常识 It’s a pity that you missed the exciting football match. 多么可惜啊，你错过了一场精彩的足球比赛。 (2)It is ＋形容词＋从句 It is natural that… 很自然…… It is strange that… 奇怪的是…… It is uncertain whether he can come to Jenny’s birthday party or not. 他来不来参加简的生日派对，这个不确定。 (3)It is ＋不及物动词＋从句 It seems that… 似乎… It happened that… 碰巧… It seemed that he didn’t tell the truth. 似乎他没有讲真话。 It happened that I was out when he called. 碰巧，他打电话的时候我在外面。 (4)It ＋过去分词＋从句 It is reported that… 据报道… It has been proved that… 已证实… It is reported that 16 people were killed in the earthquake. 据报道，在这场地震中，有16人遇难。

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