Complete the sentences with this is or that's or that.

1. A: I'm sorry I'm late.
B: ... all right.
2. A: I can't come to the party tomorrow.
B: Oh, ... a pity. Why not?
3. \(on the telephone\)
Sue: Hello, Ann. ... Sue.
Ann: Oh, hello, Sue. How are you?
4. A: You're lazy!
B: ... not true!
5. A: Jill plays the piano very well.
B: Really? I didn't know ... .
6. Mark meets Paul's sister\(Ann\).
Paul: Mark, ... my sister, Ann.
Mark: Hello, Ann.
7. A: I'm sorry I was angry yesterday.
B: ... OK. Forget it!
8. A: You're a friend of John's, aren't you?
B: Yes, ... right.