单选题 We are {{U}}certain{{/U}} that he will get over his illness.
  • A. sure
  • B. happy
  • C. surprised
  • D. excited
【正确答案】 A
【答案解析】[解析] certain“肯定的，确定的”，四个选项：sure“肯定的”；happy“高兴的”；surprised“吃惊的”；excited“兴奋的”。