Question

16. If the weather had been better, we could have had a picnic. But it    all day.

A. rained       B. rains

C. has rained     D.  is raining

Answer 1

16.   A考査动词的时态。句意：如果天气好，我们本能去野餐的。但那天一整天都下雨。根据前面的虚拟语气句子可知那天已经过去。后句叙述一个事实，"那天下了雨"这个动作已经完成，故用一般过去时。