A-A+
______ is often the case with a new idea much
问题详情
______ is often the case with a new idea, much preliminary activity and optimistic discussion produced no concrete proposals.
A．That
B．It
C．This
D．As
参考答案
正确答案：D
解析：分析句子结构，中白处应是连词，所以首先排除B和C。但that不能引导非限制性定语从句，所以答案是D。
