I think important to learn English well.
A. this
B. that
C. it
D. you are
网友回答
A. this
B. that
(答案→)C. it
D. you are
解析：
试题分析:此题考查it做形式宾语的基本结构. 一般用来做动词不定式，动名词，名词性短语和从句的形式宾语：如：I find it difficult to solve the problem. 换言之,如果宾语是一个非谓语动词或句子来充当,为了避免头重脚轻,就用it 来充当形式上的宾语.让句子看起来更舒服.此句的含义是我认为学好英语是非常重要的.故选C.