下列生物中，属于恒温动物的是                                     [ ]

A．扬子鳄          

B．鲨鱼           

C．鲤鱼            

D．熊猫

—Are you free this evening?

—_______?  I'd like to have dinner with you.

 [ ]

A. What's up

B. Go ahead

C. Good idea

D. I feel terrible