From the teacher’s patience and understanding, I have learnt what a big responsibilityis t

发布时间:2020-08-17 12:28:22

From the teacher’s patience and understanding, I have learnt what a big responsibility    is to educate us.
A. this
B. that
C. it
D. one

网友回答

A. this
B. that
(答案→)C. it
D. one
解析:本题考查it作形式主语的用法。句中have learnt后面是由what引导的感叹句, it是形式主语,动词不定式是真正的主语。
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