补全对话。
Li Lei: 1. ______ me, Tom. Do you have 2. ______ eraser?
Tom: Sorry. I 3. ______
Li Lei: Do you think David 4. ______ one?
Tom: I think so. You can ask 5. ______
Li Lei: David, may I have 6. ______ eraser, please'?
David: Sorry, Lucy has 7. ______eraser. Please go and ask her.
Li Lei: Excuse 8. ______ Lucy. May I borrow David's eraser?
Lucy: Certainly. Here you 9. ______ But you must give it back to him soon.
Li Lei: OK. 10. ______ a lot.
