^—Would you like to come to dinner this Sunday, Mr. Wang?         

^— _____[ ]

A. I'd love to, but I have lots of things to do.

B. Oh no. That'll be too tired.

C. I'll stay at home.

D. Yes, please.

把一个圆平均分成4份，每份是这个圆的（    ）分之（    ），写作（    ）。