单选题As we all know  it&n

问题补充：

单选题Asweallknow,itwas_____thatresultedintheterriblecaraccident.A.because of her carelessnessB.her being carelessC.because she was carelessD.she was so careless

答案：

B解析本题可采用减元法，把强调句型中的It was…that…去掉，就不难看出该句缺少主语。Herbeing careless是-ing形式复合结构，在句中充当主语。故选B。