It was quite a serious accident, caused by careless driving. A. which I think wa
来源：网络
时间：
推荐文章
20. It was quite a serious accident, _____caused by careless driving.
A. which I think was B. I think which was
C. which I think it was D. I think which it was
试题答案
A
解析:
选A。本题考查由which引导的非限制性定语从句，which替代先行词accident 在定语从句中作主语。I think 是插入语，放在which后面。