题干

--- Can you meet me ________ Friday afternoon?
--- Sure. I’ll be _______ then.
A.in; busyB.on; busyC.in; freeD.on; free
上一题 下一题 0.65难度 单选题 更新时间:2019-01-21 09:15:47

答案(点此获取答案解析)