Americansliketohavedifferentkindsofpartiessuchasbirthdayparties，surpriseparties，teapartiesandhouse-warmingparties．Pajama（睡衣）partiesareoneofthemostpopularkindsofpartiesintheUS．Atapajamaparty，agroupoffriendsspendthenightataperson'shouse．Itis agreatwayforchildrenorteenagerstogettogetherandhaveagoodtime．
Toholdapajamaparty，thehost（东道主）willusuallyplansomefunactivitiessuchaswatchingmoviesandplayingboardgamesandvideogames．Heorsheshouldalsopreparesomedelicioussnacksandfunfoodlikepizza．Guestsatapajamapartyshouldbringtheirownpajamas，toothbrushes，pillowsandblankets（枕头和毯子）．Butiftheyforgetsomething，theydon'tneedtoworrybecausethehostwillgivethemwhattheyneed．
Ifapajamapartyismainlyforfun，apromisnodoubtaveryimportantthinginmostAmericanschools．Apromisaformal（正式的）dancepartythatisheldatahighshchool．Thepartyisusuallyheldneartheendofthesenioryear，thelastyearofhighschool，soitisoftencalledgraduation（毕业）dance．Studentsaresupposedtowearformalclothesattheprom．APromQueenandaPromKingmayalsobecrowned（加冕）atmanyschools'proms．
31．Howmanykindsofpartiesarementionedinthepassage？___．
A．Four．
B．Five．
C．Six．
D．Seven．
32．Apajamapartyisheld___．
A．atacinema
B．atarestaurant
C．atahighschool
D．ataperson'shouse
33．Theguests___atapajamaparty．
A．canenjoysomefunactivities
B．mustusethehost'spajamas
C．havenosnacksoffunfoodtoeat
D．can'tgetwhattheyneedfromthehost
34．Thestudents___ ataprom．
A．wearformalclothes
B．playboardgames
C．areallcrowned
D．areallsurprised
35．What'sthebesttitle（题目）forthepassage？___
A．Americanschoollife
B．Pajamapartiesandproms
C．Americansleepinghabits
D．Birthdaypartiesandteaparties．
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