25.  —Can you come to my party on Wednesday?

—Sorry, I can't. I_____ finish my homework.

A. may                     B. would           C. have to

—Can you come to my party on Saturday afternoon?

—___________. I’ll have to help my parents.

A．Sorry, I can’t   B．Yes, I’d love to  C．Let’s go    D．No, I don’t think so

Can you come to my party on Wednesday?

—Sorry, I can't. I finish my homework.

A. may　 　　　　　　　　　　　　 B. would　　　　　　　　　　 C. have to