Thank you for helping me. I the final exam without your timely help. A. have failedB. will

问题补充：

Thank you for helping me. I the final exam without your timely help.

A. have failed

B. will fail

C. would have failed

D. must have failed

答案：

A. have failed

B. will fail

(答案→)C. would have failed

D. must have failed

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。