Doris’ success lies in the fact she is co-operative and eager to learn from others.A. whic

问题补充：

Doris’ success lies in the fact she is co-operative and eager to learn from others.

A. which

B. that

C. when

D. why

答案：

A. which

(答案→)B. that

C. when

D. why

解析：句意：Doris的成功在于她是善于合作的和渴望向别人学习的事实。所以选B。