So hard that we had to wait another day.
A. did it rain
B. it rained
C. has it rained
D. it has rained
网友回答
(答案→)A. did it rain
B. it rained
C. has it rained
D. it has rained
解析：考查倒装句：句意：雨下的如此大以至于我们还要再等一天。这句话使用so…that…句型，so+adj放在句首的时候，句子用部分倒装，从that后面的一般过去式，可知用一般过去式，选A。