If you have no special plans for your holidays, why not spend your time helping others？Don’t believe those people who say that young people today often think only of themselves. It’s not true at all. More and more young people in the USA volunteer to spend their school holidays working for others. And they don’t do it for money. Here are some of their stories.
Alice, 17
I’m going to help the Forest Center build new hiking paths in the mountains. It’s going to be great fun — I’ll spend the whole summer living in a forest and breathing the clean mountain air. I’m going to sleep under the moon and stars. It will be a nice sport, and I’ll be able to do something good at the same time!
Jason , 18
This summer, I’m going to volunteer with Special House Program. They build good, less expensive houses and sell them to families that are not very rich. They’ll teach me what to do, so I’ll help people and also have a chance to learn how to build houses.
Trish , 16
I’m going to teach children who have trouble in reading. I’ll work for a program called Reading for Life. Every day, I’m going to help them choose and read books that they like. I want to be a teacher, and I love children and reading, so this is going to be a great experience for me.
【小题1】What does Alice plan to work for others in summer？

Many companies use guards and expensive alarm systems to protect their property (财产). Soon a new kind of protection will be used—robots. Engineers have been working on the first mobile robots for businesses. The robots will guard factories, warehouses (仓库) and museums at night.

    The mobile robots will move around slowly on wheels. They will be able to detect (察觉,发现) people through walls and pick up sounds, such as breaking glass. They can be fixed with loud sirens to frighten thieves, or radios to signal police or guards.

    To protect a building, a robot will have to move around without knocking into the walls. Information about the building will have to be stored in the robot’s small, built-in computer. A floor map could be programmed into the computer’s memory, for example.

    A mobile robot will not be able to do everything. Unlike human guards, it will not be able to climb stairs, open doors, or move along rough ground. It won’t be able to tell the difference between friends and enemies. Because of that, people will have to be prevented from entering the area it moves.

    One kind of mobile robot will be able to “sense” whether a chair or a box has been moved and go around it. This robot will also judge size well enough so that it won’t send an alarm if a cat crosses the room. And if someone tries to steal this robot, it will sound a loud, painful siren. The three-foot-tall robot is hard to be stolen anyway. It weighs about 200 pounds.

U.S. companies pay almost $10 billion a year to protect their property with alarm systems and human guards. Mobile robots may be cheaper.  (296)

1. Why is the new kind of robots called mobile robots? Because they can _____.

A. guard factories, warehouses and museums

B. send loud, painful sirens when it is stolen

C. sense moving objects and signal police

D. move around and do the programmed work

2. How will a robot get directions for moving around a building?

A. From a human guard.                                B. From a built-in computer.

C. From another robot.                                  D. From radio signals.

3. What can be the best title of this passage?

A. New Guards.                                               B. Science and Technology.

C. Alarm Systems.                                           D. Engineers and Robots.

DNA is the whole “map” of the human body. It is something that all humans have, and it tells the body what to do. DNA is the reason that we look like our parents, because we get some of their DNA to make our own.

People have been trying to understand the human body for a long time. In 1860, Mr. Mendel discovered why we look the same as other people in our family. It is because of small things called “genes”（基因）in our body. In 1953, two scientists, Watson and Crick, found out that genes are really messages. They’re written in the DNA with a special language.

In 1961, another two scientists found the first “word” that they could understand in that language. It shows how DNA tells the cell (细胞）to build its parts. So far, scientists have found all the words in the DNA map, but we still don’t understand what they all do. By understanding what just one “word” means, we can help to save people from several illnesses. So the more we understand, the more doctors will be able to do.

Most people hope that this will help to make better medicine and help sick people. Other people worry that when we learn more “words” and find out more information, we will use it in the wrong way. Just to make people more attractive (有吸引力的), or stop sick people getting jobs.

1.When did Mr. Mendel discover why we look the same as other people in our family?

A. In 1680.????????????? ????????????? B. In 1860.????????????? ????????????? C. In 1953.????????????? ????????????? D. In 1961.

2.Watson and Crick found ______ in 1953.

A. all the words in the DNA map???

B. small things called “genes” in our body

C. the first “word” they could understand in that language

D. genes are written in the DNA with a special language

3.How can we help sick people if we understand more “words” in the DNA map?

A. Make better medicine.????????????? ????????????? ????????????? B. Make them get jobs.

C. Make maps for them.????????? ????????????? D. Make them attractive.

4. Which one is NOT true according to the passage?

A. We look like our parents because of “genes” in our body.

B. We have understood what all the words in the DNA map do.

C. Scientists have found all the words in the DNA map.

D. DNA tells the cell to build its parts.

5.What do people think about this research about DNA?

A. It can be only bad.

B. It can be only good.

C. It can be good but won’t work.?????????????

D. It can be good or bad.

If you have no special plans for your holidays, why not spend your time helping others?

Don’t listen to people who say that young people today often think only of themselves. It’s not true at all. More and more young people in the USA volunteer to spend their school holidays working for others. And they don’t do it for money. Here are some of their stories.

1.Young people in the USA volunteer to spend ____ helping others.

A. school holidays????????????? B. weekdays???????????????? C. every morning.

2.What does Alice volunteer to do in summer?

A. To sleep under the stars.?

B. To spend the whole summer living in a tent

C. To help build new hiking paths in the mountains.

3.From the passage, we know that Jason Moore _____.

A. likes reading?????????????? B. is 18 years old?????????????? C. isn’t very rich

4.________ wants to be a teacher.

A. Alice Hamilton???????????? B. Jason Moore???????????????? C. Trish Anderson

5.Which is the most possible title for this passage?

A. Reading for Life.???? B. The Forest Center??????? C. Young American Volunteer.