问题
选择题
What a kind teacher. But for his help, I __________ my study.
A．wouldn’t finish
B．wouldn’t have finished
C．shouldn’t have finished
D．mustn’t have finished
答案
B
题目分析：句意：多么好的老师，要不是她的帮助，我不可能完成学业。but for是“要不是”的意思。后面的主句要用虚拟语气，根据句意是是对过去的虚拟，所以用：would have done所以选B.