— Could you tell me ?　— I don’t know. It seemed to be unimaginable.A. whether “Dad where

问题补充：

— Could you tell me ?

— I don’t know. It seemed to be unimaginable.

A. whether “Dad, where we go” was popular

B. how was “Dad, where we go” well-known in China

C. why “Dad, where we go” is popular with all in China

D. when “Dad, where we go” is so well-known in China

答案：

A. whether “Dad, where we go” was popular

B. how was “Dad, where we go” well-known in China

(答案→)C. why “Dad, where we go” is popular with all in China

D. when “Dad, where we go” is so well-known in China

解析：句意:-你能告诉我为什么《爸爸去哪儿》在中国这么受欢迎吗？-我不知道，这好像是很难想象的。本题考查的是宾语从句，根据下文it seemed to be unimaginable. 可知二人讨论的是《爸爸去哪儿》受欢迎的原因，故选C。