菱形的一条对角线与它的边相等，则它的锐角等于（　　）

A．30°

B．45°

C．60°

D．75°

-Can you play  __________guitar?          

-Yes, I can. And I can also play  __________ basketball.        [ ]

A. a; the      

B. the;/      

C. the; the      

D. /; the