I don’t think possible to master a foreign language without much memory work.A. thisB. t

问题补充：

I don’t think possible to master a foreign language without much memory work.

A. this

B. that

C. its

D. it

答案：

A. this

B. that

C. its

(答案→)D. it

解析：形式宾语结构：it+adj.+to do sth.。