第4题: [单项选择]But for my classmates' help, I ______ the work in time. A. did not finish B. could not finish C. will not finish D. would not have finished 参考答案:D 答案解析:此句是含有含蓄条件句“but for my classmates' help”的句子,因此要选择一个虚拟语气的句子。因为是和过去的事实相反,因此D为正确答案。本句的意思是:“要不是同学们的帮助,我是不