Whether you believe it or not, it was caused the serious accident.
A. because of your carelessness that
B. because you were careless
C. you were careless that
D. your being carelessness that
网友回答
A. because of your carelessness that
B. because you were careless
C. you were careless that
(答案→)D. your being carelessness that
解析： 句意：无论你是否相信，是你的粗心导致这个严重的事故。这是一个强调句，It was+强调部分+that…，这里填强调部分，可以把这句话还原： caused the serious accident.说明强调的是主语，用动名词your being carelessness做主语，如果是C项，主语从句要加that，所以选D。