省略连词IF的虚拟条件句要倒装

　　若虚拟条件句中含有were或had，should等助动词或情态动词时，连词if可以省略,将were, had, should提到前面。

　　【例如】

　　Had I left a little earlier, I would have caught the train.

　　Were this to happen, it would cause a great deal of damage. Should it rain tomorrow, we would cancel the trip.____right now, she would get there on Sunday. (CET-4 1996,6)

　　A) Would she leave

　　B) If she leaves

　　C) Were she to leave

　　D) If she had left

　　根据主从句的时态搭配，可以判断是对将来的虚拟，条件从句省略了if，助动词提前，故答案为C。