My teacher made------easier to work out that problem in this way.A this B it C that
问题描述：
My teacher made------easier to work out that problem in this way.A this B it C that
答
it it做形式宾语。做形式宾语的规定只能是it。这个句子在it后面加一个is就是一个含有宾语从句的主从复合句，it就是宾语从句中的形式主语。
答
it it指代后面的to.........做形式宾语以避免头重脚轻
答
B.it作形式上的宾语