Question

       it rain tomorrow, we would have to call off the hike.

A．Will

B．Would

C．Should

D．Were

Answer 1

C

解析试题分析:考查虚拟语气。从后句would have to可知此处是表示对将来的虚拟，if从句中如果有should、had、were则可以省略if把这些词提前，构成倒装语序，所以C选项正确。句意：如果明天下雨的话，我们就不得不取消远足。
考点：考查虚拟语气。