—Look at the black clouds.Itsoon.—Sure.If only weout.A. is raining;didn’t comeB. is to

问题补充：

—Look at the black clouds.Itsoon.

—Sure.If only weout.

A. is raining;didn’t come

B. is to rain;won’t start

C. will rain;haven’t started

D. is going to rain;hadn’t come

答案：

A. is raining;didn’t come

B. is to rain;won’t start

C. will rain;haven’t started

(答案→)D. is going to rain;hadn’t come

解析：be going to do sth.常见的用法为:①表示按计划或安排打算去做某事；②表示有迹象表明要发生某事,此题是第二个用法。if only引起的句子中谓语部分要用虚拟语气，与过去事实相反时，用过去完成时。