已知原子核内有6个质子和6个中子的碳原子质量为a克，若另一种原子的质量为b克，则

根据对话内容， 选择恰当的句子补全下列对话。（每小题2分，共10分）

A. Wonderful. B. I forgot where I put it. C. I lent it to Tom. D. What's more, the copies in the library are all out. E. I suggest you read it if you have time. F. Sorry, I haven't got it with me. G. I have a copy of my own.

A: Have you ever read the novel Sanchongmen written by Han Han?
B: No, I haven't.
A: It's a very popular book. 小题1:    .
B: I've been expecting to read it for a long time, but I can't get a copy.   小题2:     .
A: Well, 小题3:      If you like, I can lend it to you.
B: 小题4:      . Can you lend it to me now?
A: _小题5:      . Would you please come to my house after school?
B: OK. I'll go as soon as school is over.