— How about seeing the new movie at the theatre tonight?  

—        ,but I've got to go over my notes for tomorrow's exam.    [      ]

A. All right    

B. Sounds great    

C. I can't    

D. No, I am terribly sorry

小明家到初级中学的图上距离为1厘米，实地距离为500米，则该图的比例尺是[ ]

A．1：500000

B．1：5000000

C．1：50000

D．1：5000