单选题 ______ enough time to study, I would have been able to enter university.

【正确答案】 C
【答案解析】本题考查虚拟条件句的倒装。该句意为“如果我有时间学习，我也能上大学”。在省略if的虚拟条件句中，需用倒装结构，表示与过去事实相反，相当于“If I had had time to study”。