Karen was always thinking we were talking about his poor past. Every time we were chatting together, he would be all .
A. over
B. ears
C. lone
D. through
网友回答
A. over
(答案→)B. ears
C. lone
D. through
解析：本题考查习语。all ears洗耳恭听；全神贯注地听。句意：每次我们一起交谈的时候，他都会洗耳恭听。选B。