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
12 A 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?
12 A 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?
问题解答：
我来补答展开全文阅读