单选题 About 20 of the passengers who were injured in a plane crash are said to be in ______ condition.
  • A. decisive
  • B. urgent
  • C. vital
  • D. critical
【正确答案】 D
【答案解析】本题考的是形容词与名词的搭配。A项意为“决定性的”，B项意为“急迫的”，C项意为“重大的”，D项意为“危机的”。根据题意，选项D为正确答案。