听第2段材料。回答第4至6题。
M：Did anyone phone me while I was out?
W：Nobody phoned，but．．．er．．．Mr Powell came．
M：What?But he’s the man I wanted to talk with as soon as possible．I told you all about that before I left．
W：Yes，but．．．
M：I even gave you a card with the name and phone number of the restaurant!
W：But that’s just it!You didn’t give me the card．
M：What do you mean?Of course I did．I took the card out of my wallet just before I left．Look!It isn’t in my wallet now!
W：Mr smith，what’s that card on the floor?It fell out of your wallet a second ago．
M：That card? It’s．．．er．．．it’s the card I thought I gave you．
W：You see!You forgot!That’s why I didn’t phone．
M：I'm very sorry．It wasn’t your fault．I apologize．
W：That’s all right．Please forget it．