All of us found necessary to learn a foreign language.A. thisB. thatC. itD. what

问题补充：

All of us found necessary to learn a foreign language.

A. this

B. that

C. it

D. what

答案：

A. this

B. that

(答案→)C. it

D. what

解析：可联系答.案.网客服索取。