— You look puzzled at the news.— Yes. I just can’t imagine he could have done such a thin

问题补充：

— You look puzzled at the news.

— Yes. I just can’t imagine he could have done such a thing.

A. what

B. how

C. whether

D. Where

答案：

A. what

(答案→)B. how

C. whether

D. Where

解析：what什么；how 如何，怎样；whether是否； Where在哪儿。句意：听到这个消息，你看起来很困惑啊！——是的，我只是不能想象他怎么会做这样一件事情。结合语境可知选B。