Question

Does ________ matter much if they do not come tomorrow?

A．this

B．it

C．that

D．he

Answer 1

B

试题分析：考查it的用法：为了避免头重脚轻，it可以代替主语从句，这句话是主语从句是if they do not come tomorrow，句意：他们明天不来很要紧吗？选B。
点评：主语从句能用it作形式上的主语。常以it作形式主语的句型有： A.It+be+形容词（obvious，true，natural，surprising，good，wonderful，funny，possible，likely，certain，probable，etc.）+that从句。B.It+be+名词词组（no wonder，an honor，a good thing，a pity，no surprise，etc.）+that从句。C.It+be+过去分词（said，reported，thought，expected，decided，announced，arranged，etc.）+that从句。D.It+seem，happen等不及物动词及短语+that从句。E.It+doesn’t matter（makes no difference，etc.）+连接代词或连接副词引起的主语从句。