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A. Ithelpstrainthelungstoworkhardforalongertime.
B. Ithelpsincreasethemuscles'sizeandstrength.
C. Ithelpsmaketheheartstrongandworkhard.
D. Ithelpskeepmuscleslongandsupple.

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Conversation 2

A. Itcantrainthehearttoworkhardforalongertime.
B. Itcanincreasemuscles'sizeandstrengtheventually.
C. Itcanonlyhelppeoplegetenormousandbeautifulmuscles.
D. Itcanmakebacktroublecompletelydisappear.

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A. Itisjustaboutanyamountofphysicalactivitythatimprovesfitness.
B. Itisjustanythingthatyouneedtoexertyourselftodotoburncalories.
C. Itmeansallformsofvigorousactivitiesordeliberateworkouts.
D. Itincludeseveryexercisewhichkeepsyourmusclestightandstrong.

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