WeddingsintheUnitedStatesvaryasmuchasthepeopledo.Therearechurchweddingswithagreatdealoffanfare；thereareweddingsonmountain-topswithguestsbarefooted；andtherehavebeenweddingsontheoceanfloorwithoxygentanksfortheguests.Butmanyweddings,nomatterwhereorhowtheyareperformed,includecertaintraditionalcustoms.
　　Beforeacoupleismarried，theybecomeengaged.Andtheninvitationsaresenttothosewholivenearby,theirclosefriendsandtheirrelativeswholivefaraway.Wheneverythingisready，thencomesthemostexcitingmoment.
　　Theweddingitselfusuallylastsbetween20and40minutes.Theweddingpartyentersthechurchwhiletheweddingmarchisplayed.Thebridecarryingabouquetenterslastwithherfatherwhowill"giveheraway".Thegroomentersthechurchfromasidedoor.Whentheweddingpartyisgatheredbythealtar，thebrideandgroomexchangevows.Itistraditionaltousethewords"Tohaveandtoholdfromthisdayforward，forbetter，forworse，forricher，forpoorer，insicknessandinhealth，toloveandtocherish，tilldeathdouspart".Followingthevows，thecoupleexchangerings.Wearingtheweddingringonthefourthfingerofthelefthandisanoldcustom.
　　Aftertheceremonythereisoftenaparty,calleda"reception"whichgivestheweddingguestsanopportunitytocongratulatethenewlyweds.
Thecarinwhichthecoupleleavesthechurchisdecoratedwithballoons,streamersandshavingcream.Thewords"JustMarried"arepaintedonthetrunkorbackwindow.Thebrideandgroomruntothecarunderashowerofricethrownbytheweddingguests.Whenthecoupledrivesawayfromthechurch，friendsoftenchasethemincars，honkinganddrawingattentiontothem.Andthenthecouplegoontheirhoneymoon.
小题1:What’sthemainideaofthepassage?