He is _________ about his chances of winning a gold medal in the Olympics next year.
A．optimisticB．optionalC．optimalD．obsessed
A

試題分析：句意：他對自己明年在奧運會上贏得金牌的機會很樂觀。optimistic樂觀的； optional可自由選擇的，任意的；optimal 最佳的，最優(yōu)的；obsessed迷住。根據(jù)句意判斷選A。
考點：考查形容詞在語境中的應(yīng)用辨析。
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