Question

Work your brain!
Between 2 and 3 pounds of wonder, it controls everything we say, do or think, who we are and what we care about. The way we walk or laugh or figure out things. What we like and the talents we possess. How we see and talk and run and jump and process our food.
The brain uses 20 percent of our body’s oxygen and 20 percent of its blood. Somewhere within its protein, fat, 100,000 miles of blood vessels and 100 billion nerve cells, it helps us remember where we put our gym shoes. Change our temperature so we don’t die because of the heat or cold. Speed us up or slow us down. Help us choose between orange juice or orange­flavored drinks.
Its complexity are stunning, far beyond anything most of us can imagine. To keep this work of art as polished as possible we need to eat right, exercise and keep mentally stimulated. Good nutrition helps brain cells communicate with each other. Exercise stimulates a hormone in our brain that improves memory. Mental stimulation keeps you sharp even as you age.
“It’s very important that we tell people to be physically active and mentally active,” said neurologist Malcolm Stewart.“People cannot stop aging, but you’re able to reduce the damage; you’re able to keep the function up.”
Following are Dr. Stewart’s advice for improving brain health：

Nutrition	Avoid fast food. Follow the old adage(格言): For breakfast, eat like a king; for lunch, like a queen; for supper, like a beggar.
Exercise	Do a combination of stretching aerobic and muscle strengthening every day.
Mental games	Try to have a sense of hope about the future. Do puzzles. Listen to music. Reach out to others to make their lives better.

小題1:The purpose of the author in writing this passage is to ______.

A．inform us how the brain works

B．give us advice on how to keep the brain healthy

C．tell us that the brain plays an important role in our lives

D．show how special the brain is to us

小題2:The underlined word “stunning” means ______.

A．interesting

B．strange

C．significant

D．a(chǎn)mazing

小題3:According to the text，more exercise ______.

A．keeps our mind sharp

B．helps improve our memory

C．gives our brain a rest

D．is good for brain cells communicating with each other

小題4:In order to keep brain healthy，we should avoid ______.

A．eating a good lunch	B．doing puzzles
C．eating a large supper	D．taking aerobic exercise

Answer 1

小題1:B
小題2:D
小題3:B
小題4:C

試題分析：
本文介紹了給大腦保健的方法：合理的營(yíng)養(yǎng)、適度的運(yùn)動(dòng)和智力活動(dòng)。
小題1:文章第一、二段介紹大腦的神奇，意在喚起讀者對(duì)于大腦的贊嘆并為下文“大腦保健”進(jìn)行鋪墊。然后以To keep this work of art （杰作）as polished as possible we need to eat right, exercise and keep mentally stimulated.一句揭示作者的寫作意圖。故選擇B項(xiàng)。
小題2:文章前半部分介紹了大腦的精巧和復(fù)雜。這種精巧和復(fù)雜遠(yuǎn)遠(yuǎn)超出人們的想象，令人驚嘆。故選擇D項(xiàng)。
小題3:細(xì)節(jié)題。由第三段Exercise stimulates a hormone in our brain that improves memory.一句可知，運(yùn)動(dòng)可刺激大腦里有助于改善記憶的荷爾蒙的分泌。故B項(xiàng)正確。
小題4:從表格中For breakfast, eat like a king; for lunch, like a queen; for supper, like a beggar.一句可知，給大腦保健所需要的合理營(yíng)養(yǎng)要求早飯、午飯吃好，避免豐盛的晚餐。故C項(xiàng)正確。