问题
选择题
The traffic is moving very slowly as so many cars on their way back to Shanghai.
A．am
B．is
C．are
D．be
答案
答案：C
题目分析：下文主语cars是复数形式，故谓语动词用复数，选C。
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The traffic is moving very slowly as so many cars on their way back to Shanghai.
A．am
B．is
C．are
D．be
答案：C
题目分析：下文主语cars是复数形式，故谓语动词用复数，选C。