题目内容:
According to Paragraph 3, which of the following constitutes a potential research topic?
A.Doing cat-psychology experiments. A.Doing cat-psychology experiments.
B.Decoding playing kittens’ tail-language.
B.Decoding playing kittens’ tail-language.
C.Discovering why cats can classify shapes.
C.Discovering why cats can classify shapes.
D.Investigating why cats go crazy for catnip.
D.Investigating why cats go crazy for catnip.
参考答案:
答案解析: