I really don’t know how to express my thanks to Mr. Li my high school English teacher wi

问题补充：

I really don’t know how to express my thanks to Mr. Li, my high school English teacher, without whose help I to college that year.

A. weren’t to go

B. hadn’t been able to go

C. couldn’t go

D. couldn’t have gone

答案：

A. weren’t to go

B. hadn’t been able to go

C. couldn’t go

(答案→)D. couldn’t have gone

解析： 考查虚拟语气。此题考查与过去事实相反的虚拟语气，主句应用：would/could/might + have done结构，句意：我真的不知道如何对李老师，我的高中英语老师表达感谢，没有他的帮助那一年我就上不了大学。所以选D。