选择合适的短语或从句补全对话 A. what you said B. how it happened C. who drove the car D. that I fell down on the street E. that I was knocked down by a car -What's wrong with your leg? -Well, I hurt my leg last night. -What happened? -I've forgotten how it happened. I just remember __________. -Did you see ___________? -No, I didn't. The car was going too fast and the light was so strong. -What did you tell your mother? -I told her ____________. -Do you think that she believe ___________? -I don't think so.