Thepolicemancameuptothelonelyhousewiththedoor_______,_______thereforawhileandthenenteredit.
名词解释：copyright
TheWesternCouncilforTravelResearchin_______employedthetermvisitor.
Wewillconsider______yourtermsofpayment.
InEurope_______arethetwoleadingcontendersforaglobalreservationssystem.
