Have you seen Avatar(《阿凡达》)? It’s a popular 3D movie, and you may have to wear 3D glasses to see it. The 3D glasses make the images(图像)from the movie look as if they were coming straight towards you.

More and more 3D movies are coming to theaters. Some say that 3D TV sets will come into our homes in the near future. 3D technology can make TV and movies are more exciting. However, people with eye problems may get headaches if they spend too much time watching 3D movies. Why?

When we look at an object(物体), each eye sees it at a different angle(角度). Our eyes send the two images to our brain(大脑), and the brain puts them together. 3D technology uses two film projectors(投影机). One projects a left-eye-image and the other projects a right-eye-image. 3D glasses allow us to see a different image in each eye. So, when we are watching a 3D movie, our brain can’t put together the images sent to our eyes. The brain needs to work harder at “reading” the images. That makes it easier for people with eye problems to get dizzy(头晕的) or have headaches. A famous eye doctor said if your eyes can’t focus(聚焦) on the same object at once, you will have trouble watching 3D movies.

根据短文内容完成下列问题。

1.According to the passage, Avatar is a ______.

A. digital camera B. digital TV set

C. 3D movie D. 4D movie

2.The 3D glasses can make the images from the movie ______.

A. look more beautiful than usual

B. look as if they were coming straight towards you

C. look as if they were far away from you

D. look more clear than usual

3.People will have ______ in their homes in the near future.

A. 3D computers B. 3D phones

C. 3D movies D. 3D TV sets

4.When we look at an object, ______.

A. each eye sees the object at the same angle

B. our brain puts the two different pictures together

C. there will be two film projectors in our eyes

D. our brain can’t put together the images sent to our eyes

5.If you wear a pair of 3D glasses, ______.

A. you will see different images in both eyes

B. your brain can’t work at all

C. the images can be put together easily by your brain

D. our brain can put the images together

Do you laugh every day? Most people _____ times a day. Scientists say that people laugh about 17 times a day. That is a lot of laughter.

In India, there are ______ laughter clubs. The people in these clubs get together every morning. First they stretch their hands above their heads. Then they pretend to laugh. Soon everyone is laughing naturally. People say they feel good after ______ together.

Scientists believe that laughter is good ______ you. Why For one thing, laughter is a good exercise. When you laugh, you exercise many muscles (肌肉) in your body.

Scientists say that one hundred laughs is the same as ten minutes of running. When you laugh, you also breathe deeply. This makes you feel ______ .

Why, do we laugh? That is a hard question ______. We know that people laugh ______ in a group. We don’ t laugh very often when we are alone. Many scientists believe that we use laughter to make friends with _____. Laughter helps us feel part of a group.

In English, people say that laughter is the best ______. Some think that laughter helps sick people get ______. Do you think so?

1.A. Laughs B. do C. does D. did

2.A. hundred of B. hundreds of C. hundred D. hundreds

3.A. laugh B. to laugh C. laughing D. laughed

4.A. for B. at C. with D. about

5.A. relaxed B. to relax C. relaxing D. relax

6.A. answered B. answering C. answer D. to answer

7.A. less than B. hardly C. never D. more often

8.A. another B. others C. other D. the other

9.A. magazine B. knowledge C. medicine D. friend

10.A. well B. good C. bad D. ill

One of the best-known American writers is Samuel Langhorne Clemens, whose pen-name is Mark Twain. Born in 1835, Twain grew up in the Mississippi River town of Hannibal, Missouri. Like many other boys of his day, Twain dreamed of becoming a pilot(舵手) of a river boat in order to travel along the river happily. His early life in the river town was written into his two most famous books, The Adventures of Huckleberry Finn and The Adventures of Tom Sawyer.

As a young man Twain held many jobs. He was a printer, a gold miner, and for a long time, he was a pilot of a river boat. During his pilot days, he changed his name into Mark Twain. When he travelled by boat, he began to write down what he saw along the river and what he talked with the local people. Finally, Twain became a famous writer. His works were sold out in America and Europe, and were translated into many languages, including Chinese, Japanese and French. Twain’s style of writing was simple and direct. He liked to write about important things in a humorous style.

1.Samuel Langhorne Clemens _______________ .

A. is the best-known American writer

B. never left the town of Hannibal, Missouri

C. is the hero of Huckleberry Finn and Tom Sawyer

D. used Mark Twain as his pen-name

2.Many boys of that time __________________ .

A. wanted to work on a river boat

B. just wanted to be passengers on the Mississippi

C. wanted to become writers

D. wished to become friends of Mark Twain.

3.The Adventures of Huckleberry Finn written by Mark Twain was probably about .

A. boys’ life of his day B. the life of a river boat pilot

C. the life in a river town D. Twain’s travel on riverboats

4.According to the passage, which of the following is true?

A. Mark Twain’s early life in a river town was not happy.

B. Mark Twain’s dream to be a pilot of a river boat never came true.

C. Europeans showed great interest in Mark Twain’s writings.

D. Mark Twain’s books could hardly be understood for his style.

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