大哥哥 姐姐 帮下忙了

题目

大哥哥 姐姐 帮下忙了
1.Help!Sam_____an accident
A was having B has had C has had D will have

答案

B和C咋一样呢?(楼主检查一下是否有错误）
一楼那位,现在进行时怎么会是was having?
我觉得,既然说Sam出车祸了,那应该是已经发生了,不应该用过去进行时.