单选题 The unpleasant taste of the medicine ______ in his mouth for hours.
  • A. waited
  • B. prolonged
  • C. rested
  • D. lingered
【正确答案】 D
【答案解析】linger“拖延；逗留”；wait“等待”；prolong“延长”；rest“停(留)在”。