[填空题]It is important for astronauts to exercise in order to keep their muscles fit.

[填空题]It’s important for astronauts to exercise in order to keep their muscles fit.

[简答题]It is important exercise regularly.

[单项选择]

W: Exercise, exercise, exercise. We hear so much about it these days, yet even the experts can’t agree on which exercises are best. Now some doctors are strongly encouraging arm exercises.
M: Arm exercises Is that because our arms are too fat or flabby
W: Actually, that’s not the main reason. They say that arm exercises are an ideal way to become physically fit.
M: But don’t arm exercises raise your blood pressure
W: That they do. But the article I read mentioned ways to compensate for that.
M: How
W: By adding leg exercises, so the arms don’t do all the work. Arm exercises alone aren’t enough to increase metabolism before fatigue sets in it. The more of the body that’s involved in the exercises, the better.
M: And in turn, I’m sure that there’s a great chance of losing weight.
W: Sounds right to me.
M: So what exercises do the experts recommend
W: They
A. They don’t get rid of flabby arms.
B. They can damage arm muscles.
C. They are not acceptable to most people.
D. They can raise one’s blood pressur

[单项选择] How Exercise Makes You Smarter
Exercise does more than build muscles and help prevent heart disease. New science shows that it also boosts brainpower--and may offer hope in the battle against Alzheimer(痴呆症).
The stereotype of the "dumb jock" has never sounded right to Charles Hillman. A jock himself, he plays hockey four times a week, but when he isn’t body-checking his opponents on the ice, he’s giving his mind a comparable workout in his neuroscience and kinesiology lab at the University of Illinois. Recently he started wondering if there was a vital and overlooked link between brawn and brains--if long hours at the gym could somehow build up not just muscles, but minds. With colleagues, he started an experiment. He rounded up 259 Illinois third and fifth graders, measured their body-mass index and put them through classic PE routines: the "sit-and-reach", a brisk run and timed push-ups and sit-ups. Then he checked their p
A. It can build muscles.
B. It can prevent heart disease.
C. It can keep people healthy.
D. It can improve brainpower.

[单项选择]

Weather or not exercise adds (1) the length of life, it is common experience that a certain (2) of regular exercise improves the health and contributes a feeling of well-being. Furthermore, exercise (3) involves play and recreation, and relieves nervous tension and mental fatigue in so doing, is not only pleasant but beneficial.
How much and what kind of exercise one should (4) merits careful consideration. The growing child and the normal young man and young woman thrill with the exhilaration of strenuous sports. They fatigue to the (5) of exhaustion but recover promptly with a period of rest. But not so with (6) of middle age and beyond. For them moderation is (7) vital importance. Just how much exercise a person of a given age can safely take is a question (8) to answer. Individual variability is (9) great to permit of general
A. with
B. from
C. in
D. on