She is my best teacher help I have made great progress．
A. with whom
B. whose
C. which
D. with whose
网友回答
A. with whom
B. whose
C. which
(答案→)D. with whose
解析：这each而题考查定语从句的用法：with whose help相当于with the teacher’s help，句意是：她是我最好的老师，在她的帮助下，我取得了很大的进步。选D。