问题
选择题
| — Why couldn't they meet us at five o'clock? — Because they were delayed by ______. |
A. heavy traffic B. heavy traffics C. crowded traffic D. crowded traffics |
答案
答案：A
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| — Why couldn't they meet us at five o'clock? — Because they were delayed by ______. |
A. heavy traffic B. heavy traffics C. crowded traffic D. crowded traffics |
答案：A