PEclassesusuallymeanrunning，jumpingandplayingballgames．ButstudentsatAspireMiddleSchoolinLacey，WashingtonspendtheirPEclassesdoingyoga．

"PEhasbeeneitherdanceoryogasincewestarted，"saidtheheadmasterMonicaSweet．"They'rebothverypopularclasses．"

TeacherAnneKohlbrydevelopedtheyogaprogramandbeganteachingitwhentheschoolopenedin2009．Eachclasslastsabout50minutes．Itincludessomewarm-upactivitiessuchaswalkinglaps（跑道的圈） aroundtheschool，controlledbreathing，stretches （伸展） andafewminutesofrelaxation．

Kohlbryusuallyplaysclassicalmusicwhilestudentsstretchonyogamats．Theypracticeseveralclassicposes．Forexample，todothemountainpose，studentsstandtallwithfeettogether．Theytakeadeepbreathandraisetheirhandsovertheirhead．Theirpalms（手掌） faceeachotherwitharmsstraight．Thentheytrytoreachuptowardtheskywiththeirfingertips．

Whendoingyoga，studentsneedtobecalmandfindthebalanceoftheirbodies．Ithelpsthemfocus，accordingtoKohlbry．

"Focusisabigthing-middleschoolkidsaresodistracted（分心的），"shetoldthelocalnewspaperTheOlympian．

Yogaalsomakesstudentshealthier．

"I'vehadalotofkidssaying，'Madam，I'vedevelopedasix-packmuscle（肌肉 ）'becausewedoalotofstrengthtraining，"shesaid．

Eighth-graderJessicaWallingford，14，likestheclass．"InthetwoyearsthatI'vebeenhere，therearealotofthingsI'veimprovedon．It'sprettycool．It'sbetterthanrunninglaps，"shesaid．

"Itfeelslikeexercise，"saidThomasShiveley，11．"It'snottiring，butit'sgoodexercise．"

29．PEclassesatAspireMiddleSchoolarespecialbecausethestudentsareaskedto___．

A．runontheplayground

B．doyoga

C．playballgames

D．jump

30．Doingyogacanhelpthestudents___．

A．keepbalance

B．getexcited

C．becomefocused

D．cotroltheirbreath

31．Whichwordhasthesamemeaningas"focus"inthepassage？___

A．Attention．

B．Force．

C．Distraction，