单选题 If I ______ that your business was growing so rapidly, I wouldn"t have been worried about it.
【正确答案】 C
【答案解析】[解析] 若早知道贵公司业务发展如此之快，我之前就不用担忧了。
本题考查虚拟语气的用法。“if”引导的条件状语从句，常用虚拟语气。与过去事实相反时，从句用过去完成时，主句用“should/would/could/might+have+过去分词”。因此，选项C为正确答案。