Ⅷ. 补全对话. (共5 小题,满分5 分)
从以下句子中选出恰当的句子补全对话,有两项是多余的.
A: It’s very late. Are you still on the computer?
B: Well, yes. 71
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: 72 Usually people want a quick reply.
A: 73
B: I’ve already had 40 people’s addresses in my address book! 74
A: 75 E-mail is really very convenient.