A recent research shows that physical activity (体育活动) may help students do better in their classes. The research comes because educators in some countries are reducing time for activities like P. E. class.

  Researchers go over the results of fourteen studies. Twelve were from the United States,one from Canada and one from South Africa. The studies appeared between 2009 and 2013. They included more than 55,000 children, aged six to eighteen.

  Thomas Singh,one of the researchers,says the studies showed a relationship between physical activity and scores on subjects such as math,Eng?lish and reading. Ms. Singh offers some possible explanations (解释) :

  "There are,first,physiological (生理的) explanations,like more blood flow* and so more oxygen (氧气) to the brain. Being physically active means there are more hormones (荷尔蒙) produced like endorphins (脑内啡) ,And endorphins make your stress level lower and your mood improved,which means you will perform better in class. Also,students who take part in organized sports learn rules and how to follow them. This could improve :heir classroom behaviour and help them know what :hey should do.

  All in all, the finding tells us that physically active kids are more likely to do better in school. Ms. Stugh says schools should considex the finding before they cut physical education programmes.

(   ) 26. What led the researchers to do the studies? \

   A. Schools' cutting physical activity.

   B. Their interest in physical activities.

   C. The tests included about 55,000 chil?dren.

   D. Kids' unsatisfying with schooling per?formance.

(   ) 27. How many countries took part in the studies?

   A. 14.   B. 12   C. 2.   D. 3.

(   ) 28. Which of the following is NOT one of the advantages of physical activity according to the passage?

   A. Getting more blood flow.

   B. Better classroom behaviour.

   C. Feeling relaxed and refreshed.

   D. Greater ability to organize activities.

 With a determined (坚定的) look on his face,Chicago's Michael McCarthy held on to the banister (扶手) and climbed to the top of the Willis Tower not long ago. The tower stands 1        ,451 feet (442 me?tres) tall,and it is one of the 11        buildings in the US.

 As he got to the last step,McCarthy 12        fell down,but that didn't stop him. The 14-year-old boy finally finished climbing the 2        ,109 steps and arrived at the top,where he 13        cheers from many people. .

  "I just want to show people that 14      a kid with no legs can do it,anyone can do it," McCarthy said.

McCarthy,who was born without legs? has to wear prosthetic legs (假肢) and use a stick to walk. But McCarthy has a strong 15     . He believes having a disability (残疾) shouldn't stop anyone 16        achieving his or her success.

 He has been in a special school 17        he was four. When he decided to climb the Willis Tower,his teacher? Jeff Kohn,was 18        by his determi?nation (决心) and offered to help train him. They 19      more than ten hours practising climbing stairs and keeping balance with the prosthetics and sticks on the steps every day. " 20      seems that he never knows how difficult it is. 21      I was so tired that I asked him to rest for a day," said Kohn. "But he said he was still full of energy and wanted more 22     ."

 Kohn always walked with McCarthy for the climb. "I 23        the last 10        floors he went faster,99 said Kohn. " He's the most craven sportsman I've ever trained.”

 McCarthy said he was 24        of himself and that the tower now holds special meaning. "When I,m older,I'll 25        to the building and say Look at this building I climbed”, he said.

(   ) 11. A.largest   B. highest

       C.earliest   D. latest

(   ) 12. A.seldom   B. hardly

   C. always   D. almost

(   ) 13. A.enjoyed   B. needed

   C. made   D. kept

(   ) 14. A.while   B. after

   C. if   D. though

(   ) 15. A. heart   B. hope

   C. body   D. love 

(   )16. A. by   B. for   C. in   D. from

(   )17. A. as   B. since

   C. until   D. before

(   ) 18. A. pleased   B. beaten

   C. moved   D. asked

(   ) 19. A. used   B. spent

   C. took   D. wasted

(   ) 20. A. Here   B. There

   C. He   D. It 

(   )21. A. However   B. Sometimes

   C. Again   D. Then

(   ) 22. A. friends   B. helpers

   C. time   D. exercise

(   ) 23. A. tried   B. saw

   C. did   D. met

(   ) 24. A. thinking   B. talking

   C. worried   D. proud 

(   )25. A. point   B. go

   C. turn   D. hurry

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