In the past few years, a great many teachers have found       very important to

题型：不详难度：来源：

In the past few years, a great many teachers have found       very important to teach their students how to learn.

A．this

B．that

C．one

D．it

答案

D

解析

试题分析：考查形式宾语。在英语中只有it可以作为形式主语，形式宾语。在本句中It作为形式宾语，代替真正的宾语to teach their students how to learn.句意：在过去的几年里，很多老师都发现教会学生如果学习很重要。故D正确。
点评：英语中能做形式主语和形式宾语的只有it。所以这个用法很集中，也很好掌握。