补全对话。
A: Good morning!
B: 1. ______ 2. ______!
A: Can you tell me your name?
B: Yes. 3. ______ 4. ______ is David. Are you Tim?
A: Yes, I am. 5. ______ 6. ______, David. Can you 7. ______ your name?
B: Yes. D-A-V-I-D, David.
A: Excuse me. What's this 8. ______ English?
B: It's an eraser.
A: Thank you.
B: You are welcome.
1.______ 2.______ 3.______ 4.______
5.______ 6.______ 7.______ 8.______