Here's the completed dialogue:
Ann: Are you doing anything after school, John?
Bob: Yes, I'm going to play tennis.
Ann: Really? Where are you going to play?
Bob: 1) E. At the courts just behind my house.
Ann: Oh, I didn't know there were courts there.
Bob: They're not easy to see from the street. 2) F. Do you like tennis?
Ann: Yes, I love tennis. I used to play a bit in my old town.
Bob: 3) B. Are you any good at it?
Ann: I'm not bad.
Bob: Good! 4) C. I'm afraid I can't join you today.
Ann: I'd love to but I don't have my racquet with me.
Bob: That's all right. 5) D. You can borrow my spare one.
Ann: Great! Shall we meet outside school then?