Muscles are stringy bundles of fibers varying from one five thousandth of an inch to about three inches.They have three unique characteristics： they can become shorter and thicker；they can stretch；and they can retract to their original po- sition.Under a high-powered microscope，muscle tissue is seen as long，slender cells with a grainy texture like wood.
More than half of a person's body is composed of muscle fibers，most of which are involuntary，in other words，work without conscious direction.The voluntary muscles，those that we move consciously to perform particular actions，number more than five hundred.Women have only 60 to 70 percent as much muscle as men for their body mass.That is why an average woman can't lift as much，throw as far，or hit as hard as an average man.
36.According to the selection，more than half of a person's body is composed of ____ .
A）involuntary muscles B）muscle fibers
C）sensory nerves D）voluntary muscles
37.Intelligent use of the muscles means that ____ .
A）one improves muscular action consciously
B）one always knows what his muscles are doing
C）one's muscles are used only to the extent necessary for each action they perform
D）one perform simple actions without working
38.An average woman is weaker than an average man because she has ____ .
A）60to 70percent less muscle for her body mass
B）only 60to 70percent as much musc1e for her body mass as an average man
C）less muscle fiber for her body weight
D）more voluntary muscles than an average man
39.Which of the following statements is implied but not stated？
A）Muscular sense involves automatic perception.
B）There are more than 500involuntary muscles in the body.
C）Muscle tissue is inflexible.
D）The muscular sense is more important than any other sense.
40.According to the passage，the muscular sense is responsible for ____ .
A）the normal breathing function
B）the work of only our voluntary muscles
C）directing our muscles intelligently
D）the efficiency of our muscles
Part III Vocabulary and Structure（20 minutes）
Directions：There are 30incomplete sentences in this part.For each sentence there are four choices marked A），B），C）and D）。Choose the ONE that best completes the sentence.Then mark the corresponding letter on the Answer Sheet with a single line through the centre.
4l.By the time jet aircraft could fly at a speed faster than sound，train transportation in the United States ____ over several decades.
A）was declining B）had been declining
C）has declined D）declined
42.Had Australia not been colonized by the British，English ____ there now.
A）will not be spoken B）is not spoken
C）would not have been spoken D）would not be spoken
43.I should like to rent a house，modern，comfortable and ____ in a quiet environment.
A）before all B）first of all
C）after all D）above all
More than half of a person's body is composed of muscle fibers，most of which are involuntary，in other words，work without conscious direction.The voluntary muscles，those that we move consciously to perform particular actions，number more than five hundred.Women have only 60 to 70 percent as much muscle as men for their body mass.That is why an average woman can't lift as much，throw as far，or hit as hard as an average man.
36.According to the selection，more than half of a person's body is composed of ____ .
A）involuntary muscles B）muscle fibers
C）sensory nerves D）voluntary muscles
37.Intelligent use of the muscles means that ____ .
A）one improves muscular action consciously
B）one always knows what his muscles are doing
C）one's muscles are used only to the extent necessary for each action they perform
D）one perform simple actions without working
38.An average woman is weaker than an average man because she has ____ .
A）60to 70percent less muscle for her body mass
B）only 60to 70percent as much musc1e for her body mass as an average man
C）less muscle fiber for her body weight
D）more voluntary muscles than an average man
39.Which of the following statements is implied but not stated？
A）Muscular sense involves automatic perception.
B）There are more than 500involuntary muscles in the body.
C）Muscle tissue is inflexible.
D）The muscular sense is more important than any other sense.
40.According to the passage，the muscular sense is responsible for ____ .
A）the normal breathing function
B）the work of only our voluntary muscles
C）directing our muscles intelligently
D）the efficiency of our muscles
Part III Vocabulary and Structure（20 minutes）
Directions：There are 30incomplete sentences in this part.For each sentence there are four choices marked A），B），C）and D）。Choose the ONE that best completes the sentence.Then mark the corresponding letter on the Answer Sheet with a single line through the centre.
4l.By the time jet aircraft could fly at a speed faster than sound，train transportation in the United States ____ over several decades.
A）was declining B）had been declining
C）has declined D）declined
42.Had Australia not been colonized by the British，English ____ there now.
A）will not be spoken B）is not spoken
C）would not have been spoken D）would not be spoken
43.I should like to rent a house，modern，comfortable and ____ in a quiet environment.
A）before all B）first of all
C）after all D）above all