---Have you got the final result?
---Yes, very disappointing. We have won the game.
A. need
B. could
C. can
D. must
网友回答
A. need
(答案→)B. could
C. can
D. must
解析：考查情态动词用法。句意：—你知道最后的结果了吗？—是的，很让人失望，我们本可以赢得比赛的。根据句意本句是做过去所发生事情的虚拟，故使用“情态动词+have done”；could have done本可以做某事，实际上却未做。