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---“Why couldn’t they meet us at five o’clock?”

---“Because they were delayed by ______.”


  1. A.
    heavy traffic
  2. B.
    heavy traffics
  3. C.
    crowded traffic
  4. D.
    crowded traffics
A
首先要明确traffic为不可数名词,没有复数形式,故排除B和D。另外,汉语习惯说“交通拥挤”,而英语习惯上却不能用crowded 来修饰 traffic,要表示汉语的“交通拥挤”,英语通常说heavy traffic,即选A。
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