i have ( )some prawns.A.buy B.buys C.buying D.bought

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i have ( )some prawns.A.buy B.buys C.buying D.bought
i have ( )some prawns.A.buy B.buys C.buying D.bought

i have ( )some prawns.A.buy B.buys C.buying D.bought
i have ( )some prawns.A.buy B.buys C.buying D.bought
选D
现在完成时
结构是【have/has+动词过去分词】
buy的过去分词是bought
所以选D

D have done sth. 现在完成时形式表示已经做完某事

D.bought

have表示已完成的 ABC都不符合失态 D才是过去式