At a party,Jane is talking to her friends,Kelly and Ben.
Jane:Have you two met each other before?
Kelly:…
Ben:…We went to see John at the same time.
1.Is that so?
2.I'm sorry,I don't know.
3.Oh,yes. John introduced us.
4.I don't think I have ever seen him.
1.John is our old friend.
2.It was all right. We met John.
3.That's right We met in John's office.
4.John was right. He knows both of us.