A:May I help you?B:Yes,please.I___ this pen here just now,but it doesn't____ .
A:May I help you?B:Yes,please.I___ this pen here just now,but it doesn't____ .A:What's the matter B:I don't know.Would you mind___me a new one?A:No,not at all.____a new one?B:Can I try___here right now?A:Sure.You can write on this____of paper.B:What do you think ___it?A:I think ____OK.Thanks