根据下面的对话内容，从对话前的选项中选出最佳选项填入空白处，将代号填入空白处。选项中有一个多余选项。
A. And I think e-mail is one of the best ways to municate with others.
B. I’ve got so many e-mails to go through.
C. I agree with you.
D. Of course!
E. How many e-mail addresses have you had?
F. I feel like getting more e-mails.
A: It’s very late. Are you still on the puter?
B: Well, yes. （1）B
A: What kind of e-mails?
B: Some are messages from my friends and some are from the relatives.
A: Do you have to write them back right away?
B:（2）D Usually people want a quick reply.
A:（3）E
B: I’ve already had 40 people’s addresses in my address book!（4）A
A:（5）C E-mail is really very convenient(方便的).
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解析：
【小题1】从后面的What kind of e-mails?可知上面是说：我有很多e-mail要看。选B。
【小题2】问句是Do you have to write them back right away? 回答是Usually people want a quick reply. 所以选D。当然
【小题3】回答是：I’ve already had 40 people’s addresses in my address book!说明问有多少e-mail地址。选E
【小题4】下文是E-mail is really very convenient(方便的).可知这里说电子邮件是很好的交流方式。选A。
【小题5】两个人的观点一致，用C ，I agree with you.