I think taking a walk is boring.A. a kindB. kind ofC. kinds ofD. a kind of

问题补充：

I think taking a walk is boring.

A. a kind

B. kind of

C. kinds of

D. a kind of

答案：

A. a kind

(答案→)B. kind of

C. kinds of

D. a kind of

解析：句意：我认为散步有点儿枯燥。kind表示种类时，可以组成短语a kind of一种，或all kinds of各种各样的；当表示有点时用短语kind of.结合句意， 此处表示有点儿，故选B。