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Health experts have long worried about the increasing rate of obesity in kids. Its an important concern: Being weight or obese during childhood can lead to serious problems normally seen in adults, such as diabetes and high blood pressure. Poor diets and a lack of exercise are usually the causes. But would you ever have imagined there might be a connection between the bacteria that lived in your guts （内脏）when you were a baby and the chance that you would become overweight?
Scientists in Finland recently found just such a link. In a recent study, they showed that overweight kids had different species of bacteria living in their guts.
You probably think of bacteria only as germs that can make you sick. While its true that some bacteria can make people ill, your body actually depends on some types of bacteria to help you digest food and extract nutrients from it. These good bacteria live in your guts, where they process the food you eat.
Human babies get these bacterial helpers from their moms. When a baby is born, some of the bacteria in the mother move into the babys body. Growing babies get additional good bacteria from the milk their mothers produce. And it turns out the bacteria might play an important role in regulating weight just six years later.
So how could these bacteria affect weight? The researchers still havent tested that question, but future tests might lead to an answer.
1. The link in Paragraph 2 refers to the relationship between _______.
A. bacteria and the chance of being overweight
B. obesity and diabetes
C. diets and the chance of being overweight
D. bacteria and exercise
2. Which of the following is NOT the function of good bacteria?
A. Helping to digest food.
B. Helping to take nutrients from food.
C. Helping to regulate weight.
D. Making a person ill.
3. The purpose of writing this passage is to _______.
A. introduce the role of bacteria in childrens weight
B. analyze the influence of obesity on kids
C. give advice on how to lose weight quickly
D. explain the function of bacteria in foods
（二）
One event that helps educate young people about things they can do for others is National Youth Service Day (NYSD). Every year on this day, organizations all over the country celebrate young volunteers, educate young people about how they can help their country, and invite them to participate in service projects. Former Secretary of State Colin Powell said, National Youth Service Day honors young volunteers and is an invitation to others to join hands and do our part as Americans.
Founded in 1988, NYSD originally took place on a Tuesday. Now the event lasts from Friday until Sunday so that more people can participate in it. More than 200 organizations work together to create thousands of projects each year. Millions of young people across the United States take part in these service projects.
Long before the event, people, community groups, schools, and nonprofit organizations think of ways to meet their communities needs. Then, they plan projects for young volunteers. Projects include bringing food to hungry people, tutoring younger children and helping senior citizens. During the event, young people from the community do things like planting neighborhood gardens and cleaning up local parks.
The organizations that contribute to NYSD believe that volunteering and community service are important activities for people of all ages, but especially for young people. Young people who volunteer are more likely to do well in school, vote, and contribute to charities. More important, they help other people and make the world a better place for everyone.
4. The aim of National Youth Service Day is to _______.
A. educate young people on responsibility
B. invite young people to meet each other
C. encourage young people to serve others
D. celebrate the growth of young people
5. On National Youth Service Day, young volunteers will _______.
A. do some cleaning in public places
B. prepare food for hungry people
C. plant vegetables and fruit
D. help old people to learn
6. The purpose of writing this passage is to _______.
A. warn young people not to affect their schooling during volunteering
B. keep a record of how young people celebrate their festival
C. introduce an event National Youth Service Day
D. advise young people to be cooperative when volunteering
（三）
A traveler was passing through a desert on a hot day. He was tired, feeling thirsty and hungry. At least, he needed a shady spot to rest for a while. A big leafy tree came into view at some distance away. He felt glad and said to himself, Had I water to drink, now. Yes, he found a glass full of cold water on the ground right in front of him. Then, he wished, Had I something to eat right here. Immediately, a variety of dishes appeared before him. He was under the shade of Kalpa-Vriksha a magical tree. Whoever was under it would have whatever he wished for!
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