根据对话内容，选择适当的句子补全对话。 A.How do you know about it? B.Let me write it down. C.Right? D.What about you? E.Why not give him a call? Peter:What are you doing here,Emily? Emily:I'm reading a book. Peter:A book on computer. 1 Emily: 2 Peter:I heard that you bought a computer last week. Emily:Yes,but I can't use it. 3 Peter:Neither can I. You'd better ask for Nick's help.He bought one two years ago and knows a lot. Emily:He's always busy.It's difficult to meet him. Peter: 4 Emily:I don't know his telephone nmber. Peter:I can tell you. Emily:Wait a minute. 5 Say,please. Peter:3860531. Emily:OK,Thank you. 1.____ 2.____ 3.____ 4.____ 5.____