It took him a long time to the skills he needed to become a professional artist.A. acquire

问题补充：

It took him a long time to the skills he needed to become a professional artist.

A. acquire

B. inquire

C. require

D. request

答案：

(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。