A: Peter, how about playing basketball together this afternoon?
B: I'm busy. Maybe another time.
A: What are you doing?
B: I'm. I must finish it on time.
A: What plan? Is it very important?
B: Yes. It's about .
A: What kind of volunteer work do you do?
B: I help out at the old people's home and I organize some activities.
A: Can I join you?
B:
