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答案：IV1．speaking2.as3.The4.or5.based6.because7.enlarged8.vocabulary9.who10．that/whichⅤ1actually2impolite3fluently4insteadof5direction6eastern7blocks8expression9recognizing10culturalⅥ1His,hadbeentherefor2shewould,thenextday3asked,if/whetherIhasseen,thenightbefore4asked,whenhewenttobed,before5ThehostaskedustogotoseethemagainifwehadtimeⅤOnmywayhomeonthebus,Isawanoldmantogetonwithhisgrandson.Hewascarryingtheboyschoolbagandviolin.boy’sIofferedmyseatstotheoldmanatonce.Therefore,theboysatdownfirst.seatHoweverTheoldmanhastostandnearby.Afterawhile,thehadboyshoutedtohergrandpaforwaterandthendroppedtheemptyhisbottleoverthebus.WhenIsawthis,Igotmuchangry.Ithinktheonveryboyshouldonlyrespectandtakecareoftheoldmanbutalso∧keepanenvironmentclean.notthe