完形填空。
SteveandYaserfirstmetintheirEnglishclassatanAmericanuniversity.Yaserwasanexchangestudent__1__London.Hewantedtolearn__2__aboutAmericancultureandhopedthatheandStevewould__3__goodfriends.AtfirstSteve__4__veryfriendly.HealwaysgreetedYaserwarmlybeforeclass.TheystudiedtogetherandSteveoftenhelpedYaserwithhisEnglish.He__5__invitedYasertoeatlunchwithhim.Butafterthesemesterwasover.__6__changed.Theydidn'tseeeachotherverymuchatschool.OnedayYaser__7__tocallStevebutStevedidn'tseemvery__8__intalkingtohim.Yaserwashurt,“Stevesaidwewerefriends.”Yaser__9__,“andIthoughtfriendswerefriendsforever.”Yaserisalittleconfused.
Asaforeigner,hedoesn'tunderstandthewayAmericansviewfriendship.Thefriendshipisbasedoncommoninterests.__10__theactivityends,thefriendshipmayfade(淡化).NowasSteveandYaserarenolongerclassmates,their“friendship”haschanged.