IV.补全对话
Betty: HiAlan.ThisisBetty?mcallingfromSydney.Alan: FromSydney?1.
Betty: ?mhavingaholiday.
Alan: íiowistheweatherthere?2.
Betty: Yesitis.
Alan: 3.
Betty: Noit'scool.
Alan: 4.
Betty: NoI'mnot.?mhavingaterriblecold.
Alan: ?msorrytohearthat.
A.Isitsunny?
B.Areyouhavingagoodtime?
C.WhatareyoudoinginSydney?
D.Isitveryhot?
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