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Mary and her sister arent playing basktball now what are mary and her sister doing when are they playing basketball who is playing basketball marry and her sister are playing basketball now,arent they thier children arent always making noise in the apartment what are doing thier children  who is making noise their children are making noisein the apartment,arent they they dont make experiments  in the labarotory who makes experiments in the labarotory where do they make experiments they make experiments in the labarotory,dont they