汉语说“交通拥挤”，说成英语是heavy traffic，还是crowded traffic? 请看题：
“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
【陷阱】B、C、D三项均容易误选。
【分析】对于此题，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。如下面一题也是选A：
She is not a competent driver and can’t cope with driving in _______.
N-COUNT. 交通阻塞;堵车. A traffic jam is a long line of vehicles that cannot move forward because there is too much traffic, or because the road is blocked by something.
I'm happy when I get on the freeway because I don't have to wait for traffic lights.
上高速时我开心极了，因为我再也不用等红灯了。
He insures the cars against traffic accidents.
他为车投保了事故险。
You must follow traffic signs; obedience is compulsory.
遵守交通指示牌，服从(它的命令)是你必须做的。
