When the last prize had been awarded everybody cleared off. A. and B. so C. or D
来源：网络
时间：
推荐文章
When the last prize had been awarded _________ everybody cleared off.
A. and B. so C. or D. 不 填
试题答案
A
解析:
句首 when 引导的是一个时间状语从句，它暗示整个句子为复合句；而so, and, or 为并列连词，无论选哪一个，都表明整个句子为并列句，从而导致前后矛盾，所以A、B、C均不能选择。此题正确答案选D，everybody cleared off 为整个 复合句的主句