题干

—You should have thanked the hostess before leaving.
—I meant ________.But I couldn't find her when I was leaving.
A.to doB.toC.doingD.doing so
上一题 下一题 0.64难度 单项选择 更新时间:2014-07-10 06:16:06

答案(点此获取答案解析)