As for most students they find it very difficultEnglish well. A. to learn B. learning C.

问题补充：

As for most students, they find it very difficultEnglish well.

A. to learn B. learning C. learn

答案：

解析：

这题考查it做形式宾语的用法：句型是：Sb find it+adj+to do，it是形式宾语，不定式才是真正的宾语。选A。