Heisabouthischancesofwinningag

He is _________ about his chances of winning a gold medal in the Olympics next year.

A．optimistic

B．optional

C．optimal

D．obsessed

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She_____ have left school, for her bike is still here.

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A．the; a

B．a; a

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A．you can hope

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A．giving in

B．giving off

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