单选题 (During) that terrible snowstorm, the police (demanded) that people (stayed off) High-way 101 except (in cases of) emergency.
  • A. During
  • B. demanded
  • C. stayed off
  • D. in cases of


【正确答案】 C
【答案解析】应改为stay off。demand后面要用虚拟语气，即：(should)+动词原形。