—Would you like to go and see Avatar with me tonight?                

—Thank you very much, but I _____ it already.                [ ]

A. see                      

B. will see                

C. have seen                

D. am seeing

下列对炉贝的形状描述正确的是（）。

A、圆柱形或近球形

B、类扁球形或圆锥形

C、近球形

D、长圆锥形