Light travels at a speed which is about a million times faster than the speed of sound. You can get some idea of this difference by watching the start of a race. If you stand some distance(距离) away from the starter, you can see smoke from his gun before the sound reaches your ears.

This great speed of light produces some strange facts. Sunlight(太阳光) takes about 8 minutes to reach us. If you look at the light of the moon tonight, remember that the light rays left the moon 1.3 seconds before they reached you. The nearest star is so far away that the light that you can see from it tonight started to travel towards you four years ago at a speed of nearly 2 million km. per minute. In some cases, the light from one of tonight’s stars had started on its journey to you before you were born.

Thus, if we want to be honest, we can’t say, “The stars are shining tonight.” We have to say instead, “The stars look pretty. They were shining four years ago, but their light has only just reached the earth.”

1.Light speed is ______ sound speed.

A. as fast as                          

B. a million times slower than

C. about millions of times faster than     

D. about a million times faster than

2. If you stand 200 meters away from a man who is firing a gun to start a race, you will find out that ______.

A. you can hear the sound before you see the smoke

B. the sound does not travel as fast as light

C. the sound will reach you before the man fires

D. sound travels about a million times faster than light

3.Sunlight obviously(显然的) ______ than the light of the moon.

A. has to travel a greater distance          

B. moves less quickly

C. travels much more quickly            

D. is less powerful

4. The scientific way of saying "The stars are shining tonight" should be ______.

A. the stars have been shining all the time

B. the stars seen tonight will shine four years later

C. the stars were shining long ago but seen tonight

D. the starlight seen today could be seen four years ago

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, In1860, 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 those small parts are really messages . They’re written in the DNA with a special language.

In1961, 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 do not understand what they all do. By understanding what just one “word ”means, we can help to save people from several illness. 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 2000.     B. In 1961      C. In 1953     D In 1860

2.What did the two scientists find in 1961? They found_____.

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．those small parts 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 article?

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

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

C．DNA is the whole “map” of the human body.

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 and bad

BEIJING--Lights went out for an hour at some famous landmarks and homes all over the world on March 28 for Earth Hour 2010. It is a global event created by the WWF(World Wildlife Fund) to make people pay more attention to climate change.
From the Sydney Opera House and Harbor Bridge to the Eiffel Tower in Pari sand London’s Houses of Parliament, lights went out to encourage people to cut energy use.
Organizers said the action showed that a great number of people wanted the government to take measures to fight global warming by the end of 2010. "We have been dreaming of a new climate deal for a long time," said Kim Carstensen, head of a global climate organization. "Now we’re no longer alone with the dream. We’re sharing it with all these people turning off their lights," he said.
Australia first held Earth Hour in 2007 and it went global in 2008, attracting 50 million people. WWF is hoping one billion people from 1,000 cities in nearly 90 countries will take part in the event.
Oriental Pearl Tower in Shanghai, the Bird’s Nest in Beijing and many other famous buildings in China also joined in this event.
【小题1】The event "Earth Hour" was created to make people pay more attention to __
A. Sydney Opera House    B. climate change           C. March 28
【小题2】According to the passage people who took part in the event__ on March 28.
A. turned off the lights for one hour     B. turned down the lights for 2 hours
C. turned on the lights for 3 hours
【小题3】         created Earth Hour event first in     
A. America, 2008          B. Canada, 2010            C. Australia, 2007
【小题4】__ famous landmarks are mentioned in the passage.
A. Four                    B. Five                     C. Six
【小题5】The Earth Hour event was created by __
A. Global Climate Organization    B. World Wildlife Fund    C. Kim Cartensen

根据句子意思，用所给单词的适当形式填空，将答案写在答卷上。（每小题1分）

1.He sent his __________ (regard ) to his friends by e-mails.

2.Nowadays many young people prefer surfing the Internet to ________ ( read ) books.

3.She was ashamed of her son’s bad _________ ( behave ).

4.Jack was _________ ( disappoint ) at the news.

5.I’m not strong enough ________ ( carry ) the box upstairs.

6.Our classroom is on the _______ ( three ) floor.

7.Our Chinese teacher always speaks to us ______ ( gentle ). We all love her.

8.He tried to behave well to make a good ______ ( impress )on the teachers.

9.We have been busy _______ ( prepare ) for the exams these days.

10.After three years, the stadium ___________（take）shape at last.