题目

____ knocked down and hurt worried her friends. A. Kate’s being   B. Kate was C. Kate being    D. Kate had been   答案：A动名词的复合结构作主语应该是规范的形式。4．用天平称一个塑料瓶的质量，然后将其剪碎再放到天平上称，则其质量将（　　）A．变小B．不变C．变大D．无法确定