第30题: [单项选择]______ for you help, we’’ d never have been able to get over the difficulties. A. Had it not been B. If it were not C. Had it not D. If we had not been 参考答案:A 答案解析:本题主句的谓语为 would never have been able to...,表示过去的虚拟情况,因此,从句中的谓语表示的也应为过去的虚拟情况,谓语动词应为had+过去分词。