onApril1,isadaywhenpeopleplayembarrassingtricksontheirfriendsandcolleaguesandevenontheirteachers.AnotherholidaywithsomesimilaritytoAprilFools’DayisHalloweenonOctober31,(9)whenchildrenwearfunnyorscarycostumesandasktheirneighborsfor“tricksortreats”.ThenameHalloweenmeans“hallowedevening”,thenightbeforeAllSaints’DaywhenChristiansaintsarehonored.Onthefollowingday,AllSouls’Day,servicesandprayersaresaidforthedead.Inmanycountries,itisadaywhenfamiliesvisitcemeteriesandplaceflowersonthetombsoftheirrelatives.InEurope,LaborDayiscelebratedonMay1,(10)whereasinCanadaandtheUnitedStates,laborandlaborersarehonoredbyalegalholidayonthefirstMondayinSeptember.(A)(6)A.状语从句——表示对比B.定语从句——表示时间(B)(7)A.状语从句——表示地点B.定语从句——修饰先行词(B)(8)A.状语从句——表示对比B.状语从句——表示让步(B)(9)A.状语从句——表示时间B.定语从句——修饰先行词(B)(10)A.定语从句——修饰先行词B.状语从句——表示对比