问题补充：
the help of her teacher, Mary in the past few months.
A. With; has made progress
B. Under; has made a progress
C. With; had made progress
D. Under; had made a progress
答案：
(答案→)A. With; has made progress
B. Under; has made a progress
C. With; had made progress
D. Under; had made a progress
解析：考查介词及短语。With the help of在……的帮助下；make progress取得进步，根据in the past few months可知用现在完成时，选A。
