语法与词汇 All of us would have enjoyed the party much more if there _____ quite such a crowd of people there.无

【正确答案】 C

【答案解析】句意：要是没有这么多人，我们本可以玩得更开心的。本题考查虚拟语气，主句有would have done，可推知是对过去的虚拟，要用过去完成时。因此选C。