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
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。