Thanks to help from his teachers and classmates, he has made rapid progress in his studies.
A. 不填；a
B. the; 不填
C. the; a
D. a; the
网友回答
A. 不填；a
(答案→)B. the; 不填
C. the; a
D. a; the
解析：考查冠词：第一空是填the，特指是来自老师和同学的帮忙，第二空不填，因为progress，是不可数名词，句意：多亏了老师同学的帮助，他的学习取得了很大的进步。选B。