题目内容：

it was_that resulted in the terrible accident.A.because of her carelessnessB.her being carelessnessC.because she wascarelessD.she was so careless.

优质解答

选B.
that 是一个代词,它代替它前面的词也就是_,即是_的内容可以和that替换,而B替换that后句子依然通顺.