If the weather had been better ,we could have had the concert in the openb air,But it_all dayA rains B rained C has rained Dis raining

问题描述:

If the weather had been better ,we could have had the concert in the openb air,But it_all day
A rains B rained C has rained Dis raining

前面是虚拟语气,与事实相反,选 A 表示rain这个动作一致持续到现在

选B
因为if从句使用过去完成时,主句是could+完成时,这是过去式的虚拟语气,表示过去的事情

选B.
虚拟语气题.if引导的条件句,用的是过去完成,而主句是could have done的结构,明显的是虚拟语气与过去事实相反的情况,表示的是过去发生的事.那天一整天都在下雨,所以选B.rained.