The key to exercise solutions in chapter 10A - On your marks, set, go! for the textbook English File Advanced - Student's Book with authors Christina Latham-Koenig, Clive Oxenden, Jerry Lambert and Kate Chomacki from Oxford University Press
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The winners were circuits (burns more calories, interesting and varied, has a wider range of benefits), Pilates (burns slightly more calories, is addictive, improves strength as well as posture), and spinning (less boring, very good for your heart and lungs).