题干

-I looked after a group of fifteen French children, you know.
-That  easy
A.mustn’t beB.mustn’t have been
C.can’t have beenD.can’t be
上一题 下一题 0.64难度 单项选择 更新时间:2014-12-16 06:37:43

答案(点此获取答案解析)