You could have won the first prize,___?翻译疑问句

You could have won the first prize,___?翻译疑问句 --congratulations!You have got first prize in the game!--___ 1.John won the first prize in the contest.___ A:Congratulations!You have won the first prize in the School You have won first prize in our beauty competition. won the first prize=won first prize? i have won first prize in the match .为什么first前不加the ? Sheila isunderstood ------ won the first prize 为什么是Who won the first prize? Sheila is understood won the first prize 1.___ came that Linda won the first prize in the English tes he won the first prize in the speech competition without ___