Question

--- Look at the black clouds. It ______ soon.
　--- Sure. If only we ______ out.

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

Answer 1

D

表示“天将下雨”常用It’s going to rain。If only...表示“但愿……”；如果表示与过去的事实相反，句中谓语动词常用过去完成时态。