【正确答案】 A

【答案解析】[解析] 画线词debate为动词，意为“辩论，争论，讨论”。A项discuss意为“讨论，辩论”；例：We will discuss that matter after supper. 我们晚饭后再讨论那个问题。B项defeat意为“战胜. 打败”；例：They defeated the enemy in the battle. 他们在那次战斗中打败了敌人。C项delay意为“延期，耽搁”；例：Many flights were delayed because of the bad weather. 由于天气不好，许多航班都被延迟了。D项decline意为“拒绝；下降，衰退，衰落”；例：Her popularity declined after her retirement. 她退休后名气也下降了。故选A。