___ it rain tomorrow, we would have to cancel the football match. A．Were B．Would C．Should

___ it rain tomorrow, we would have to cancel the football match.
A．Were B．Would C．Should D．Will

C



试题分析：句意：如果明天下雨，我们就不得不取消足球比赛。根据主句的would have to…，可知这是和将来相反的虚拟条件句，条件句的谓语可以用should do/did/Were to do，也可以省略if，提前should，were，但是如果是were的话，it后面要有to，所以选C。

选d。 虚拟语气暗示下雨的可能性不大。 举两例： 人们常说—— should you have any question, please do not hesitate to ask. 有问题的话，仅管提出来。 should someone ask, tell them i'm in a meeting. 有人问起的话，告诉他们我在开会。