牛肾的类型属于（）

A.复肾

B.有沟多 * * 肾

C.有沟单 * * 肾

D.光滑多 * * 肾

E.光滑单 * * 肾

It's a fine day. Shall we go out for a walk?       [ ]

A. great      

B. windy        

C. sunny      

D. well