【简介】感谢网友“雕龙文库”参与投稿，这里小编给大家分享一些，方便大家学习。
16.This is a purely _______ problem, not a political one.
A. additional B. assiduous
C. adamant D. academic
academic adj.学术的、理论的
additional 额外的、附加的
additive 添加剂
addendum 补充、附录 add(增加)end(结束：尾巴)um
adder 蝰蛇
deaf as an adder 充耳不闻
insidious 阴险的、狡诈的 in(往里)sid(坐)ious(形容词缀)
preside 主持
consider 考虑
adamant 固执的 adam(亚当)ant(蚂蚁)
