问题补充:
单选题Thankyouforhelpingme.Ithefinalexamwithoutyourtimelyhelp.A.have failedB.will failC.would have failedD.must have failed
答案:
C解析本题考查虚拟语气。Without your timely help可以转换为if引导的条件从句的虚拟语气。本句是对过去事情的虚拟,主句要用would/should/could/migh + have done。句意:谢谢你帮助了我。没有你的及时帮助,我期末考试就不及格了。