【题目】______ it rain tomorrow, we would have to put off the sports meeting.
A.Were
B.Should
C.Would
D.Could

【答案】B
【解析】考查虚拟语气。If引导的虚拟条件句，当从句中含有were/ should/had时，常省略if，把提到句首，were/ should/had；对现在虚拟，从句用一般过去时，be动词用were，对过去虚拟，从句用过去完成时；对将来虚拟，从句用一般过去时或should/would+动词原形；根据tomorrow可知，是对将来进行虚拟，故选B。句意：万一明天下雨的话，我们就推迟举行运动会。