I find very difficult to learn English well .A. thatB. thisC. oneD. it

问题补充：

I find very difficult to learn English well .

A. that

B. this

C. one

D. it

答案：

A. that

B. this

C. one

(答案→)D. it

解析：此题重点考查固定句型结构sb find it+形容词+to do sth表示某人发现做 某事怎样，其中it是形式宾语，真正的宾语是后面的动词不定式。根据语境可知此句的含义是我发现学好英语非常困难,故选D.