BHiMrBlackWhatsthatb的精选

问题详情：口语交际选出恰当句子补全对话A:Hi,James! B:Hi,MrBlack!What'sthatbehindyou?A:_______(1)    B:Arobot(机器人)?Whatcanitdoforyou?A:Itcanhelpmerememberalotofimportantthings.B:Really?Itsoundsve...