My father has worked for 20 years in the field of medicine so he has a huge amount of exp

问题补充：

My father has worked for 20 years in the field of medicine, so he has a huge amount of experience.

A. achieved

B. piled

C. completed

D. accumulated

答案：

A. achieved

B. piled

C. completed

(答案→)D. accumulated

解析：动词词义辨析。A获得；得到；B堆积；C完成；D积累；句意：我的父亲在医学领域工作了，所以他积累了很多的经验。根据句意说明D正确。