Complete the conversations with the sentences on the right. b yes? a do you have a pen? b don't. (i'm sorry. that's ok. excuse me! ) b)'s very cold. b (yes ,of course.can i close the window? c) traffic is bad today. and sit down. (i'm sorry.i'm late.don't worry.)

A: Excuse me!
B: Yes?
A: Do you have a pen?
B: I'm sorry. I don't.
A: That's OK.

A: Can I close the window? It's very cold.
B: Yes, of course.

A: I'm sorry. I'm late. The traffic is bad today.
B: Don't worry. Come and sit down.