2. 职称英语
  3. They have been waiting for many hours. The airplane must have been ______.A、of s

They have been waiting for many hours. The airplane must have been ______.A、of s

游客2025-03-25  17
问题 They have been waiting for many hours. The airplane must have been ______.
选项 A、of schedule
B、on schedule
C、ahead of schedule
D、behind schedule
答案 D
解析 本题测试介词短语的用法。根据题意，是指航班晚点，故应选behind schedule“落后于预定计划”。of schedule搭配不存在；on schedule“按时”；ahead of schedule“提前”。
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