Some intelligent and successful people find difficult to succeed in language learning. A

问题补充：

Some intelligent and successful people find difficult to succeed in language learning.

A. them

B. it

C. themselves

D. itself

答案：

A. them

(答案→)B. it

C. themselves

D. itself

解析：考查it做形式宾语：句型：find it+adj+to do sth…,发现做…怎样…,句意：一些聪明的勤奋的人发现在语言学习的上很难成功。选B。