2. 外语
  3. Physical fitness is the result of many factors—good medical care, proper nutrition, adequate rest and relaxation, and sensible p

Physical fitness is the result of many factors—good medical care, proper nutrition, adequate rest and relaxation, and sensible p

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问题    Physical fitness is the result of many factors—good medical care, proper nutrition, adequate rest and relaxation, and sensible personal habit.
But these are never enough. An essential factor                                    【M1】______
is regularly physical activity-exercise for a body that needs it to function well. 【M2】______
   All of us know that ordinary movements—things as running, jumping,             【M3】______
and bending— made possible by muscles. Muscles also do many other things.         【M4】______
They suck air into your lungs, push food along your digestive tract, and tighten your blood vessels to raise blood pressure when you need more pressure for an emergency. Your heart is a muscular pump.
   When your muscles are not used, or are not used enough, they do not develop and grow
proper. They soon become flabby and weak, shrink in size,                          【M5】______
and lose the ability to do the jobs they were mean to do.                          【M6】______
Recent studies showed that the average high school student spends fifteen to thirty hours a week watching television and only two hours a week in organizing play or exercise.      【M7】______
That is one reason why one-third of the 200,000 pupils tested for the President’s Council on Physical Fitness failed a simple test of strength, stamina, and flexible.                   【M8】______
Some of the boys and girls could not raise themselves to a sitting position without
used their hands!                                                                  【M9】______
   Cars and buses, elevators and escalators, TV and push-button machines all tend  【M10】______
reduce strenuous physical activity. But our bodies still need exercise. Without it they soon become weak, ineffective, and unattractive.  
【M7】
选项
答案organizing→organized
解析 非谓语动词误用。organizing play or exercise放在介词in的后面，介词in后的介词宾浯是名词play or exercise，修饰名词的organize和名词之问是被动关系，应该用organize的过去分词形式作名词的定语，应改为organized。  
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