Doris' success lies in the fact she is co-operative and eager to learn from others.
A. which
B. that
C. when
D. Why
网友回答
A. which
(答案→)B. that
C. when
D. Why
解析:主要测试同位语从句。首先看句子意思:Doris的成功在于她的合作和向别人学习的精神。有语境可知句子中名词fact后应该用同位语从句。另外句子中不缺少成分,只需要引导词,因此最佳答案应该选择B。