英语时态填空did you know how the accident（事故） （happen） that aftern

Did you know how the accident _______(happen) that afternoon ----How did this accident happen?----You know ,it ___ diffic --How did the accident happen? Did you see the accident happen how did you get to know all about the accident When did the car accident happen?(同义句） How did the accident happen?改同义句 when did the accident happen 英语单句改错!今天要 1 .do you know anything about the accident happen 英语一道选择题 ——"Where did the accident happen?" How did you get to know all about the accident?-----_____. How in the world did you know that