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單項(xiàng)選擇題

After（）the bid, major construction began in Beijing.

A.win
B.wining
C.winning
D.won

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單項(xiàng)選擇題

Ann is studying（）at university.

A.politic
B.politics
C.politician
D.political

單項(xiàng)選擇題

After（）the shopping list, I found that I forgot to buy salt.

A.examining
B.testing
C.checking
D.seeing