题干

— How much did he charge you ___ the service? — Luckily, it's free ___ charge.
A.for ; ofB.for ; for
C.of ; forD.of ; of
上一题 下一题 0.85难度 单项选择 更新时间:2016-04-22 04:34:37

答案(点此获取答案解析)