1) I can eat this with you
2) I could talk to you
3) I could go for a walk
4) I want any help
B 1) I have a lot of work to do
2) Please go on working
3) I need to ask a favor
4) Please don' t look at me
C 1) No, please do
2) I'm sorry
3) No, of course not
4) Yes, of course