题干

______ is known to all is that the old scientist, for ______ life was hard in the past, still works very hard in his eighties.
A.As; whomB.What; whomC.It; whomD.As; whose
上一题 下一题 0.64难度 单项选择 更新时间:2016-02-19 04:50:20

答案(点此获取答案解析)