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根据短文内容及首字母提示,填写所缺单词,并将答案填写在答题卡标号为66-75的相应位置。

Once upon a time, there was a man with a ?ne house, healthy animals and fertile land. He also had a handsome, lovely son. But the man was worried about his son, b 1. the boy grew up knowing only good times and comfortable life.

“What will happen when something goes w 2. for him?” wondered his father. “How will he know what to do?” So one day, the man asked the boy to go into the f 3. and collect wood. To help him carry the wood home, the man gave the boy an old cart and two horses. As he was l 4. , the man said to his son, “If the cart breaks down w 5. you are in the forest, don’t worry. Real Need will teach you what to do.”

The boy collected as m 6. wood as he could and put it onto the cart. But when the cart was filled with wood, it broke under the weight of the wood. “I hope that Real Need lives n 7. ,” thought the boy, and he started crying out,“Real Need! Real Need! Where are you? Can you help me?” The boy called and called, but n 8. came, so he had no choice but to repair the cart h9. .

When he arrived home he said to his father, “You said Real Need would t10. me to repair the cart, but I couldn’t ?nd him anywhere. I had to ?x it all by myself.” The man smiled happily and thought,“Real Need really is the best teacher.”

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Do you sometimes find you want to eat chocolate or ice cream very much? Do you then make it but feel guilty about it later?

The next time this happens to you, think back if you have had enough sleep over the last 3-5 days. Many adults and even teens have noticed that they crave "midnight snacks" when working or watching TV late.

New research shows that lack of sleep could lead us to have an increased appetite (食欲)- especially for the unhealthy kind.

Recently, researchers at the University of Chicago carried out a study that clearly shows that a lack of sleep actually changes our brain chemistry! Studies were done on two control groups over four days. Both groups had their food and sleep strictly controlled. All of them received three meals. The only difference was that one group was allowed to sleep for 7.5 hours while the other group slept for a little more than four hours.

During the following visit, their sleep patterns were exchanged. After the last night of the session, the volunteers were offered as much food as they wanted to eat. Researchers noticed that in both sessions, people who sleep less ate on an average 300 calories more than those who had slept more. This was much more calories than what their bodies would need to make up for the three fewer hours of sleep.

What Is Going On?

The researchers then analyzed the chemicals (化学成分) in the blood of the people in the study. What they noticed was surprising. High levels of ghrelin (a chemical that makes us hungry) and lower levels of leptin (the chemical that tells the brain that it is satisfied) were found in the people with less sleep.

Even more surprising was that this group had higher levels of endocannabinoids - the same chemical that is caused by drugs such as cannabis (大麻). The endocannabinoid system causes a craving for sugar and fatty foods and leads to overeating even when the body is not hungry. This study suggests that sleep changes help produce chemicals in the body that are similar to taking drugs!

Furthermore, researchers noticed that food cravings continued for a long period of time, well after the lack of sleep. This increases the risk of over-eating for longer periods, leading to obesity (肥胖).

Your body needs 7-8 hours of sleep each night. So, the next time you reach for a bag of chips or a slice of decadent cake, think of the amount of sleep you have had recently!

1.According to the passage, people want to eat more when they ________.

A.work B.watch TV C.sleep less D.sleep more

2.The word ‘crave’ in paragraph 2 most probably means ________.

A.hope B.want C.hate D.dislike

3.From the passage, we can learn that ________.

A.people feel guilty about eating chocolate

B.unhealthy food makes people sleep less and less

C.a person’s sleep has nothing to do with his/her appetite

D.a study about sleep and obesity was carried out at the University of Chicago

4.The chemical that makes us feel hungry is called ________.

A.ghrelin B.leptim

C.cannabis D.endocannabinoids

5.This article is mainly about ________.

A.researchers working on people’s sleep

B.how people’s sleep influences their appetite

C.how much people need to eat after sleeping less

D.A research about chemicals in the blood of people

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