侵蚀性葡萄胎与绒毛膜癌最主要的区别点是()A．活组织检查镜下有无绒毛结构 B．距葡萄

从方框中选出最佳选项完成对话。
A:    1  
B: Yes, please.    2   But it’s not on this shelf.
A: Let me find it on the computer first.    3  
B: The Sound of Music.
A: Here it is. It’s on that shelf. Let me get it you.
B: Thank you    4  
A: 3 days. You must keep it well.    5  
B: I know. Thank you. Bye.
A: Bye.

A. And please return it on time.         B. I’m looking for a book. C. I want to borrow a DVD.               D. How long can I keep it? E. Can I help you?                       F. Can you help me, please. G. What’s the name of the DVD?