问题补充:
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:
A. this
B. that
C. one
(答案→)D. it
解析: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。