道德在原始社会萌芽，后来先后出现了（）
A、奴隶社会道德ABCD
暂无解析
—Icametoyourofficeyesterdaymorning,butnobodywasin.
—Oh,we__________ameetinginthemeetingroom.
____beforewedepartthedayaftertomorrow,weshouldhaveawonderfuldinnerparty.
Sometimesabus____getsonthebustocheckthetickets.
Hearrived____London____acoldwinternight.
Toobtainasatisfactoryresult，onemustapplytwo（）ofpaintonacleansurface.
