题干

_____ in writing a lecture speech on Chinese History, he didn’t hear anybody knocking at the door.
A.Having absorbedB.To be absorbed
C.AbsorbedD.Absorbing
上一题 下一题 0.64难度 单项选择 更新时间:2014-07-10 05:38:25

答案(点此获取答案解析)