问答题
Identifythemainideaofthefollowingparagraphandmaketherevisionofit.AccordingtoRachelJones,AssistantDirectorofHousingService,theinitialpurchaseandinstallationofcarpetingwouldcost$300perroom.Consideringthenumberofroomsinthethreeresidencehalls,carpetingamounts
答案:
at the beginning