单选题 He is {{U}}hopeful{{/U}} about his chances of winning a gold medal in the Olympics next year.
  • A. optimistic
  • B. optional
  • C. outstanding
  • D. obvious
【正确答案】 A
【答案解析】[解析] optimistic“乐观的，乐观主义的”；optional“可任意选择的，非强制的”；outstanding“杰出的，优秀的”；obvious“明显的”。