题目内容：

A)根据短文内容填表格，一空一词

Taking more walks

Sitting and studying all the time will raise your grades. Getting some exercise may help, too. New scientists say that taking walks makes kids pay attention better.

Earlier research report had shown that mice learn, remember, and pay attention better after they exercise on a running wheel for several weeks. Mice which exercise have more blood run to the head than those who don’t. And they can think faster.

Scientists from University of Illinois at Urbana-Champaign wanted to find out if the same thing is true for humans. First, they examined the health of 41 adults, aged 58 to 77, after each person walked 1 mile. Then, they input their information onto the computer and worked out the results. They looked at arrows(箭头) on the computer screen and had to use the computer and arrows to show which direction was special.

Adults who were healthy were faster at the arrow task, and their answers were just as right as those who were less healthy, the scientists found. The healthy persons also had more blood run to a part of their head responsible for paying attention and making decisions.

In a second study, 15 old people who finished a 6-month training class were faster at attention tasks compared with 14 students who did few simple exercises for the same amount of time.

So, even going for a walk every 3 days for just 10 minutes can help. That may be good news for your grandparents as well. The results of exercising on the brains of younger people haven’t been studied yet. Still, it’s useful to take unusual study breaks, go for a walk or run with your friends. You might even do better in school after that.

Taking more walks
How to raise your grades	Sitting and studying for a long time will raise your grades. Getting some exercise is also 1.. For example, walking 2. kids’ attention.
Why walks help	Earlier research report had shown that mice learn, remember, and pay attention better after several weeks of 3.. More blood can make them think faster.
The special research on humans	①Scientists wanted to find out 4. the same thing is true for humans or not. First, they examined the health of 41 adults, after they walked 1 mile. Then, they looked at 5. on a computer and study which direction was special. ②The scientists found that 6. adults were faster at the arrow task. More blood runs to a part of the persons’ head responsible for 7. attention and making decisions. ③In another study, 15 old people who finished a period of training class can think faster than the students who did few 8. exercises for the same time.
Conclusion	Even going for a walk twice a week for just ten minutes can help. 9. that’s good news for your grandparents as well. The results of exercising on the brains of the young haven’t been studied yet. But taking unusual study breaks, 10. or running with your friends may also help you raise your grades in school.