题目

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 答案：A 解析: 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。已知，则下列函数的图象错误的是          A．的图象     B．图象     C．的图象   D．的图象