【单选题】
He is（）about his chances of winning a gold medal in the Olympics next year.
A、optimistic
B、optional
C、outstanding
D、obvious
查看正确答案A、careful about B、good at C、slow at D、interested in
搜题
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第4题
A、that he has his engines in reverse B、that he is shortening the distance between vessels C、to shorten the distance between vessels D、that his vessel is healthy
