AHaveyouheardoflifei的精选

问题详情：补全对话A:Haveyouheardoflifeinspace,Mary?B:No,notyet.___________（1）A:UFOs?Youmeanthealiens(外星人)?B:Yeah!___________（2）A:Really?Whendidheseethem?B:Oh,itwasaboutoneo’clockinthemorning.Hewasgoingo...