They have been waiting for hours to see the singer，but the airplane must have been ________. A. behi...
2022-10-03 08:30:06 55次 2017-2018学年高中英语（牛津译林版必修二江苏卷） 单元综合测评2 单项填空 反馈错误 加入收藏 正确率 : 100%
题目内容：
They have been waiting for hours to see the singer，but the airplane must have been ________.
A. behind the times B. behind schedule
C. ahead of time D. in no time
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