---Look at the black clouds.It ________ soon.---Sure.If only we ________.A.is raining; didn’t eB.is to rain; won’t startC.isn’t rain; haven’t startedD.is going to rain; hadn’t e
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D解析black clouds表明有下雨的迹象,故第一个空用be going to表将来;后一句是虚拟语气,叙述与过去事实相反的情况或愿望。