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If you buy the first WoW expansion,would you be plyniag in the Cataclysm world? If I buy the first one,would I still be able to play in the,new,cataclysm world,just no content past TBC?Such as not being able to get past level 60? Oh and,If I have a trial,could I still play with it once I buy the first WoW?(If the question above is right.)If not,then do I have to wait till I get cataclysm to play on my trial account,or not at all?Thanks.