It is quite impossible that it will rain tomorrow. But if it I would still go to school

问题补充：

It is quite impossible that it will rain tomorrow. But if it , I would still go to school by bike.

A. should rain

B. would rain

C. rains

D. had rained

答案：

(答案→)A. should rain

B. would rain

C. rains

D. had rained

解析：句意：明天不可能下雨，但是如果下雨，我依然骑车去学校。表示与将来事实相反，条件状语从句中的谓语动词一般过去时或should(were to) + 动词原形，而主句中的谓语动词则用would / should/could might + 动词原形。可知选A。