两位骑士决定用剑术决斗来解决他们的荣誉争端。

The two knights decided to settle their honor dispute with a ___duel using swords.

这场辩论变成了两位候选人之间的激烈对决。

The debate turned into a fierce ___duel between the two candidates.

两位枪手将在日落时分决斗。

The two gunmen will ___duel at sunset.