It took him a long time to the skills he needed to bee a professional artist.
A. acquire
B. inquire
C. require
D. request
网友回答
(答案→)A. acquire
B. inquire
C. require
D. request
解析：考查动词：A. acquire获得，B. inquire询问，C. require 要求，D. request请求，句意：获得他成为专业的艺术家需要的技能花了他很长时间。选A。