The accident was supposed___due to careless driving.Ato happen Bto have happened Chappening
问题描述：
The accident was supposed___due to careless driving.Ato happen Bto have happened Chappening
\The accident was supposed___due to careless driving.A.to happen B.to have happened C.happening D.having happened
求原因 谢
答
短语Be suppose to do something.是“被认为是…”所以排除C D,
因为前面是was,所以“认为”这一动作是已过去的,用过去时,
而“accident”是在“认为”之前发生的,即过去的过去,用过去完成时,即have done something
我用手机不方便,回答不详尽请见谅,