He is______about his chances of winning a gold medal in the Olympics next year.

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问题 He is______about his chances of winning a gold medal in the Olympics next year.

选项 A、optimistic
B、optional
C、outstanding
D、obvious

答案A

解析四选项的意思分别是：A项“乐观的，乐观主义的”；B项“可任意选择的，非强制的”；C项“杰出的，优秀的”；D项“明显的”。

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