题目内容

Of all the ________, he is the most popular one.

A. men singers B. man singers C. men singer D. man singer

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On June 26, 2000, two scientists, called Francis Collins and Craig Venter, told the world that they could now read the whole “map” of the human body: DNA. DNA is something that everybody has, and it tells the body what to do. DNA is the reason that we look like our mother and father, 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, Gregor Mendel discovered a special reason why we look the same as other people in our family. It is because of small things named “genes” in our body. In 1953, James Watson and Francis Crick made another discovery and found out that those small parts are real messages written in the DNA with a special language.

In 1961, Marshall Nirenberg and Johann Matthaei found a message in DNA showing how DNA tells the cell (细胞) to build its parts. Scientists have now found all the words in the DNA map, but we still do not understand what they all do. By understanding what just one “word” means, we can help save more people from several illnesses.

Most people hope that this will help make better medicine and help sick people. Other people worry that when people begin to know more words and find out lots of other information, we might use it in a wrong way, just to make people more attractive, or stop sick people from getting jobs. Man would have to meet a lot of trouble if DNA technic wasn’t limited in use.

根据短文内容，选择最佳答案。

1.What did the two scientists first discover in 1961?

A. The “map” of DNA. B. A new illness.

C. The language of DNA. D. A message of DNA.

2.What can we do if we understand some “words” of the language inside the body?

A. Make people get new jobs. B. Make medicine for illnesses.

C. Make maps of human. D. Make people less attractive.

3.What do people think about this work?

A. It can cause good or bad results. B. It can cause only good results.

C. It can cause good results but won’t work. D. It can cause only bad results.

– ________ is it from your school to your home?

– It’s about _________ on foot.

A. How far; 20 minutes B. How long; 20 minutes’

C. How far; 20 minutes’ D. How long; 20 minutes

Barbara Finch, from England, started a friendship with Elizabeth Martin from New Zealand when the two were just 14 years old. And they have been penfriends for the past seventy years.

“Seventy years is a long time and such a lot has happened,” says Barbara.“I've lost my husband and my son, and she's lost her husband and her daughter. With things like that, her friendship means a lot to me.”

The two started writing letters to each other in November 1947. At that time, Barbara was a pupil. In her school, there was an exchange (交换) teacher from New Zealand. She helped her students to find penfriends from her country. Among the many penfriends, Barbara and Elizabeth were the only pair to form a long-term friendship.

Now both 84, the pair continue to send weekly e-mails to tell each other about their daily lives. Barbara, who's a proud great-grandmother, has kept every single letter and card Elizabeth sent her over the years.

“We e-mail each other now rather than write letters, partly because it's quicker but mostly because there's no cost,” Barbara says.

The pair not only write to each other, but they also meet face to face. They have visited each other 15 times — Barbara flying to New Zealand 10 times and Elizabeth flying to England 5 times.

“Her family has become a second family to me. She says I am the sister she never had,”Barbara says.

1.What do Barbara and Elizabeth have in common?

A. They are both good at writing.

B. They both have two children.

C. They both lost their husband.

D. They were both teachers before.

2.What does Paragraph 3 mainly talk about?

A. What Barbara and Elizabeth wrote in their letters.

B. How Barbara and Elizabeth became penfriends.

C. The good things about making penfriends.

D. A teacher who influenced Barbara a lot.

3.Barbara and Elizabeth now e-mail each other instead of writing letters mostly because ________.

A. it is free B. it is popular

C. it saves time D. it saves paper

4.Which is the best title for the passage?

A. Old habits B. Good old days

C. A lifelong friendship D. Communication and friendship

Miss Green reminded the students ________ loudly in the library.

A. to speak B. speaking C. not to speak D. not speaking

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

—What did you do on Saturday?

—I spent 3 hours my homework.

A. to doing B. to do C. in doing D. for doing

She asked me ________ I had returned the books to the library, I nodded and said “yes”.

A. when B. why C. whether D. how

If all of us pull together, there must be something we can do _____ the environment.

A. improve B. to improve C. improving D. improved

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