小题1:B
小题2:D
小题3:E
小题4:A
小题5:C
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.