The human body is a living machine, and, like all machines, it needs “fuel” to supply it with energy. This is provided by the food we eat. But how much do we need to stay healthy?
The energy value of food is usually measured in calories(卡). A calorie is the amount of heat required to raise the temperature of 1 kg of water by 1℃. The number of calories people need per day is different, as the picture shows. Also, the number of calories you use at any one moment normally depends on the activity you are in. For example, you need more calories for standing than for sitting, more for running than for walking, and so on.
The energy in food is in the form of three kinds of chemical materials—carbohydrate（碳水化合物）, protein（蛋白质） and fat. Carbohydrate provides 3.8 Cal /gm of the energy, protein 4.0 Cal/gm, and fat 8.8 Cal/gm. Each food contains different amounts of these materials, as the round pictures show.
(P= protein      C= carbohydrate    F=fat)
【小题1】How many calories are needed to raise the temperature of 5kg of water from 35℃ to 90℃?

Time Temp Glasses

Are you a person who wants to know the time and temperature during the day? You might like Temp Glasses. These special glasses show the time above your right eye and the temperature your left eye. It is surely easier than wearing a wristwatch, and you never have to guess the Tature.

Alarm() Fork

Do you eat too quickly? Do you eat too much? How can the Alarm Fork help you? Aren't you is (好奇的)? Well, this special fork has two lights: one green and one red. When the green is on, it's OK to eat a piece of food. The fork "knows" when you eat a piece, and soon the red goes on. Wait for the green light before you eat another piece.

Smell This

Sow do you know if your breath smells nice, or if it smells bad? It's difficult It) know, because it’s very hard to smell the air that comes out of your own mouth. Smell This is useful for this ion. Smell This covers your nose and your mouth. Docs your breath smell nice, or do you need a piece of gum(口香糖)?

Banana Suitcase(手提箱)

Has this ever happened to you? You put a banana in your bag lunch in the morning, and when pen the bag at noon, the banana looks like someone drove a car over it. If you put your banana Banana Suitcase, this will never happen. It keeps a banana safe, delicious, and looking like a m!

1.The writer thinks that the four inventions are_.

A. dangerous          B. useless        C. unusual         D. expensive

2.A person who wants to lose weight may be interested in_.

A. Time Temp Glasses        B. Alarm Fork       C. Smell This  D. Banana Suitcase

3.Which invention is most helpful for someone waiting for a train?

A. Time Temp Glasses.       B. Alarm I ink.       C. Smell This.        D. Banana Suitcase.

4.If you want to know how your breath is. you may buy _.

A. Time Temp Glasses        B. Alarm Fork       C. Smell This D. Banana Suitcase

5.Who might use the Banana Suitcase?

A. A person who eats bananas only at home.

B. Someone who needs to throw away a banana.

C. A person who has little interest in eating bananas.

D. Someone who loves bananas and brings lunch to school every day.

In every country, there are thousands of people who want to help out. Many join organizations run (管理) by their governments, for example, the Peace Corps in the United States and Voluntary Service Overseas in Britain. Since the powerful (猛烈的) earthquake took place in Sichuan, more than 200 thousand volunteers across China have been helping there! They do all kinds of work or come up with ways to help improve life. Some offer their professional skills for free. Others have no qualifications (资历), but they love to work hard to help.

One of the most famous volunteers in the world was Mother Teresa. She could be the best volunteer because she gave her life to helping the poorest people of Calcutta. She helped the homeless, cared for the sick, gave out food, and became the mother of those without families.

Now more and more teenagers actively look for volunteering opportunities, too. They volunteer because they think it will be fun or they will learn something. They also like the idea of being helpful to others, even if it is just handing out books for the teacher. As they get older, these reasons are still the same, but there are other important reasons for volunteering such as learning on-the-job, getting work experience, and improving their social life.

All volunteers bring joy to the people they help in so many ways. They might read books to the blind, fix up broken homes, find ways to get water for villages. Could you be a volunteer? What kind of volunteer work could you do? There is someone in the world who needs you.

1.The Peace Corps is   __   in the United States.

A. a city      B. an organization C. a volunteer D. a school

2.The word those in the passage means   __  .

A. the homeless  B. the sick         C. the poor        D. the kids

3.What is NOT the reason for teenagers to be volunteers according to the passage?

A. They want to make more friends.  

B. They want to be helpful.

C. It helps them get work experience.

D. It can improve their social life.

4.Which of the following is true according to the passage?

A. Volunteers need qualifications.

B. Volunteers offer their help without any pay.

C. Young kids can’t be volunteers.      

D. Some volunteers bring joy to others.

5.What is the main idea of this passage?

A. The world needs volunteers.       

B. Mother Teresa was a great volunteer.

C. Volunteers do all kinds of work.     

D. There are different ways of volunteering.

阅读短文，完成下面句子，每空一词。

In the 21st century classroom, modern technology has made our learning experience more interesting. Also, it’s more interactive(互动的).

     Now three kinds of tools in the 21st century classroom---a whiteboard, a computer screen and some audio tools(音频工具) are available. They have made a big difference in how students learn. An interactive whiteboard allows the teacher to show pictures and provide sound as well. A large computer screen has colorful pictures and sound in it. So lots of students’ attention is attracted by what they see and hear. Different kinds of audio tools, such as earphones and microphone, also help to make sure that everyone can hear the teacher. In the past, if a child missed some of what the teacher said, the child may have been too nervous to ask the teacher to repeat it. Now the students are not likely to miss what the teacher says with these audio tools.

   The 21st century classroom is able to teach students more than one thing. Just imagine an English lesson is given in a modern classroom like this. How would it be different from a classroom in the past? The answer is simple. The students would learn about not only the subject itself but also how to use the modern machines.

   The 21st century classroom can make teaching and learning easier. Now everyone is able to express their opinions or answer questions without having to speak loud. Since everyone can do it, the teacher can easily see who needs more help in other ways.

    It’s clear that the 21st century classroom is really making a great difference.

1.Modern technology has made our learning experience more _________ and the technology is also more __________.

2.An interactive whiteboard can provide not only __________but also_________.

3.A computer screen with pictures and sound in it can attract students’_________, and there is less chance of ________ what the teacher says.

4.In a modern classroom, students can learn about both the _________itself and the use of _____________.

5.This passage mainly talks about audio tools like _________ and _________.

Time Temp Glasses

Are you a person who wants to know the time and temperature during the day? You might like Temp Glasses. These special glasses show the time above your right eye and the temperature your left eye. It is surely easier than wearing a wristwatch, and you never have to guess the Tature.

Alarm() Fork

Do you eat too quickly? Do you eat too much? How can the Alarm Fork help you? Aren't you is (好奇的)? Well, this special fork has two lights: one green and one red. When the green is on, it's OK to eat a piece of food. The fork "knows" when you eat a piece, and soon the red goes on. Wait for the green light before you eat another piece.

Smell This

Sow do you know if your breath smells nice, or if it smells bad? It's difficult It) know, because it’s very hard to smell the air that comes out of your own mouth. Smell This is useful for this ion. Smell This covers your nose and your mouth. Docs your breath smell nice, or do you need a piece of gum(口香糖)?

Banana Suitcase(手提箱)

Has this ever happened to you? You put a banana in your bag lunch in the morning, and when pen the bag at noon, the banana looks like someone drove a car over it. If you put your banana Banana Suitcase, this will never happen. It keeps a banana safe, delicious, and looking like a m!

1.The writer thinks that the four inventions are_.

A. dangerous          B. useless        C. unusual         D. expensive

2.A person who wants to lose weight may be interested in_.

A. Time Temp Glasses        B. Alarm Fork       C. Smell This  D. Banana Suitcase

3.Which invention is most helpful for someone waiting for a train?

A. Time Temp Glasses.       B. Alarm I ink.       C. Smell This.        D. Banana Suitcase.

4.If you want to know how your breath is. you may buy _.

A. Time Temp Glasses        B. Alarm Fork       C. Smell This D. Banana Suitcase

5.Who might use the Banana Suitcase?

A. A person who eats bananas only at home.

B. Someone who needs to throw away a banana.

C. A person who has little interest in eating bananas.

D. Someone who loves bananas and brings lunch to school every day.