Unlike many other boys of his age who are often addicted to PC games, he is on outdoor activities in the mountains.
A. eager
B. starving
C. keen
D. fond
网友回答
A. eager
B. starving
(答案→)C. keen
D. fond
解析：考查形容词的区分。句义：不像许多沉溺于网络游戏的他这个年龄段的孩子，他喜爱爬山。把握关键词：on 构成短语：be keen on 喜爱，而be eager to do 渴望做某事，be starving to do 渴望做某事，be fond of 喜欢，所以C正确。