I like penguins because they are interesting.A. a kind ofB. kinds ofC. kind ofD. kind

问题补充：

I like penguins because they are interesting.

A. a kind of

B. kinds of

C. kind of

D. kind

答案：

A. a kind of

B. kinds of

(答案→)C. kind of

D. kind

解析：a kind of表示某一类，而 kind of为固定短语，表示有点… 故选C