老版新概念三第一课[A Puma at Large]课后练习题求解2

问题描述:

老版新概念三第一课[A Puma at Large]课后练习题求解2
12A private collector is a man who collects .(lines 15-16)
a.for his own benefit b.on his own c.in private d.unknown to the public
我的选择是(c),正确答案是(a),why?

不要从语法的角度去想这个问题,用常识来解释啊!
偷偷的收藏?说得过去吗?肯定是为了收益而收藏啊!
说明你专注于做题,而不思考!