Americaisamobilesociety.FriendshipsbetweenAmericanscanbecloseandreal,yetdisappearsoonifsituationschange.Neithersidefeelshurtbythis.BothmayexchangeChristmasgreetingsforayearortwo,perhapsafewlettersforawhile—thennomore.Ifthesametwopeoplemeetagainbychance,evenyearslater,theypickupthefriendship.ThiscanbequitedifficultforusChinesetounderstand,becausefriendshipsbetweenusflowermoreslowlybutthenmaybecomelifelongfeelings,extending(延伸)sometimesdeeplyintobothfamilies.Americansarereadytoreceiveusforeignersattheirhomes,sharetheirholidays,andtheirhomelife.Theywillenjoywelcomingusandbepleasedifweaccepttheirhospitality(好客)easily.AnotherdifficultpointforusChinesetounderstandAmericansisthatalthoughtheyincludeuswarmlyintheirpersonaleverydaylives,theydon’tshowtheirpolitenesstousifitrequiresagreatdealoftime.Thisisusuallytheoppositeofthepracticeinourcountrywherewemaybegenerouswithourtime.Sometimes,we,ashosts,willappearatairportseveninthemiddleofthenighttomeetafriend.Wemaytakedaysofftoactasguidestoourforeignfriends.TheAmericans,however,expresstheirwelcomeusuallyathomes,buttrulycannotmanagethetimetodoagreatdealwithavisitoroutsidetheirdailyroutine.Theywillprobablyexpectustogetourselvesfromtheairporttoourownhotelbybus.Andtheyexpectthatwewillphonethemfromthere.Oncewearriveattheirhomes,thewelcomewillbefull,warmandreal.Wewillfindourselvestreatedhospitably.FortheAmericans,itisoftenconsideredmorefriendlytoinviteafriendtotheirhomesthantogotorestaurants,exceptforpurelybusinessmatters.Soaccepttheirhospitalityathome!1.Thewriterofthispassagemustbe______.A.anAmericanB.aChineseC.aprofessorD.astudent2.WhichofthefollowingstatementsisTRUEaccordingtothepassage?A.FriendshipsbetweenAmericansusuallyextenddeeplyintotheirfamilies.B.FriendshipsbetweenAmericansusuallylastforalltheirlives.C.Americansalwaysshowtheirwarmtheveniftheyareverybusy.D.Americanswillcontinuetheirfriendshipsagainevenafteralongbreak.3.FromthelasttwoparagraphswecanlearnthatwhenwearriveinAmericatovisitanAmericanfriend,wewillprobablybe______.A.warmlywelcomedattheairportB.offeredaridetohishomeC