【lt'sveryimportantthatkidslearnhowtolookaftertheirbodies.That'sw______theyhavePEclass.InBritainstudentshavetwohoursofPEclasse________week.Yourparentswillseehowgoodyouarea______pushups,aswellasMathsAnditdoesn't】

　　lt'sveryimportantthatkidslearnhowtolookaftertheirbodies.That'sw______theyhavePEclass.

　　InBritainstudentshavetwohoursofPEclasse________week.

　　Yourparentswillseehowgoodyouarea______pushups,aswellasMaths

　　Anditdoesn'taffectyourchancesofg______intoagoodschool.

　　第一题为什么是why？

　　原因请说清楚！