单选题
As we all know, it was______that made his dream broken.
A、
her being careless
B、
because of her carelessness
C、
because she was careless
D、
she was so careless
【正确答案】
A
【答案解析】
[解析] 把强调句型中的It was…that…去掉，就不难看出该句缺少主语。Her being care- less动名词复合结构，在句中充当主语。
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