单选题
During
that terrible snowstorm, the police
demanded
that people
stayed off
Highway 101 except
in cases of
emergency.
A. During
B. demanded
C. stayed off
D. in cases of
A
B
C
D
【正确答案】
C
【答案解析】
应改为stayoff。demand后面要用虚拟语气，即：(should)+动词原形。
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