口腔流行病学主要研究（） A.牙病在人群中的分布规律 B.口腔疾病在人群中的分布规律

从方框中选出适当的句子补全对话，有两项多余。
A: Look, Linda. What’s that in English?
B: It’s a coat. It’s a black one.
A:  小题1:
B: Yes, is it yours?
A: No. Mine is old.  小题2: 
B: It looks like Mr. Smith’s.
A: Look, he is over there.
B:  小题3:  
A: Excuse me, Mr. Smith. 小题4:  
C: Let me see. Yes, it is mine. Where do you get it?
B:   小题5: 
A: Here you are.
C: Thank you very much.
A: You are welcome.

A. Let’s go and ask him. B. You are welcome. C. Whose is it? D. Is this coat yours? E. Is it new? F. In that tree. G. Is it very nice?