根据材料内容选择最佳答案。

(  )6. According to the new study, ______.

A. dinosaurs were cold-blooded

B. dinosaurs were warm-blooded

C. dinosaurs were not completely warm-blooded or cold-blooded

D. some dinosaurs were warm-blooded and some were cold-blooded

(  )7. The underlined sentence in Paragraph 2 means that ______.

A. it’s bad news to get the idea

B. it’s good news to get the idea

C. the idea is the same as what scientists predicted

D. the idea is different from what people usually think

(  )8. John M. Grady and his team studied many things about different kinds of dinosaurs EXCEPT their ______.

A. body size                     B. eating habit