PEclasseshavebecomeanightmare（噩梦）forLiuFei，a15-year-oldstudent．Hehastorunatl（46）___4laps（圈）oftheplaygroundineveryPEclass．That'sn（47）___1，500meters!Liuisp（48）___forthePEtestnextspring．

　　PE classes have become a nightmare （噩梦） for Liu Fei，a 15-year-old student．He has to run at

　　l（46）___4laps （圈） of the playground in every PE class．That's n（47）___1，500meters!

　　Liu is p（48）___for the PE test next spring．Many Junior 3students have started doing so．The test is very important．It is w（49）___40points in the senior high school entrance examination （中考）．

　　It usually i（50）___long-distance running，long jump，rope skipping and sit-ups （仰卧起坐）．

　　"Now I can run 1000meters in only 3minutes 40seconds，about 30seconds f（51）___than before．"Liu said．

　　A PE teacher from Zhenjiang with teaching e（52）___of 10years，said，"Long-distance running r（53）___lots of energy and endurance （耐力），which cannot be gained in a short time．

　　Taking up other activities early is also n（54）___．Teachers will teach you some skills and you need time to practice．

　　Training is important，but don't forget to protect yourself．He s（55）___that students should warm up before training．Start slowly and build up the activity a little at a time．