A:Hello!May I speak to Tom, please B:Speaking. [16] A:This is Bill. I called you yesterday, but youwere not at home. B:[17]I need to prepare something for my tripto Shanghai. A:ShanghaiThat’s where the World Exposition(世博会)is being held. How lucky you are! B:So I am. [18] A:I, have a birthday party next Friday. Wouldyou like to come B: [19]My plane will take off next Wednesday. A:What a pity(遗憾)that you can’t come![20] B:Thank you very much. Bye! A:Bye! A.Who’s that B.I’d like to, but I’m afraid I can’t. C.I’m buying something for my aunt. D.Have a good trip! E.I was shopping at that time. F.Who are you G.What did you call me for