The earth is our home. We must take care of it. Life today is easier than it was        years ago, but it has brought some new problems. One of the biggest problems is pollution（污染）. We can see it, smell it, drink it and even       it. Man has polluted the        . The more people, the more pollution.Many years ago, the problem was not so serious because there were not so       people. When the land was used up (用光), the river was not clean in a place,man went to       place. Now man is slowly polluting the whole world       pollution is still the most serious, it’s bad for       things in the world.Many countries don’t le t people burn       for air in houses and factories in the city. Pollution by SO2 is now the most dangerous kind of       pollution. It’s caused by heavy traffic. People say it’s       to ride bikes. When you are       , there is no pollution. But even in developed countries, most people don’t go to work by bike. It’s not      bikes are expen sive or people are tired if they ride to work. It’s because the number of cars on the roads becomes larger. So more people       their bikes and go to work by cars,  then things are getting       . We should have special roads only for bikes and make it       difficult and expensive for drivers to take their cars into the city that they will go back to use their bikes. 

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

2.A. listen         B. listen to         C. hear of        D. hear 

3.A. moon          B. star               C. earth             D. sun 

4.A. lot            B. little             C. many             D. much  

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

6.A. Air           B. Food              C. Water            D. Noise  

7.A. life           B. live              C. living            D. lives 

8.A. something bad              B. bad something  

C. something good              D. good something 

9.A. water           B. air             C. noise          D. white 

10.A. least           B. best            C. most             D. worst 

11.A. driving       B. biked           C. riding           D. ridden 

12.A. why             B. because          C. what              D. how 

13.A. put on          B. look at         C. put away        D. look up 

14.A. better and better              B. more and more  

C. worse and worse                     D. bigger and bigger 

15.A. quite            B. such              C. very               D. so

In 1961 Obama was born in Hawaii, US. His father is an African and his mother is a white American. He grew up in Indonesia and Hawaii.
When Obama was 10 years old, he was one of only three black students at his school in Hawaii. He felt very different from most other students. White girls wanted to touch his hair. A white boy even asked him what his father was.
“I lied to them that my father was a Kenyan prince（王子）. But I kept asking myself who I am,” said Obama.
However, 37 years later, the boy made history. Obama became the first black president（总统） in US history.
This unusual background（背景） made him wonder who he was. He once turned to alcohol (酒) to help forget this question.
With the help of his friends, Obama finally turned his life around at college. His hard work made him a star at Harvard. Later, he became only the third black senator (参议员) in US history.
“Obama’s success has made Martin Luther King’s dream come true. That is: A man should not be judged （判断）by the color of his skin, but by the content of his character,” wrote ABC news.
(   ) 6 Obama was born in _______________.
A Britain      B America      C Kenya        D Indonesia
(   ) 7 There was/were _______black students besides Obama at the school where he studied when he was ten.
A no           B one              C two          D three
(   ) 8 Obama became the first black president in US history when he was ______.
A 37            B 40                C 47           D 50
(   ) 9 Which of the following is true?
A Obama’s father was a Kenyan prince.
B Obama once forgot who his father was with the help of alcohol.
C Obama was so dishonest when he was young that nobody believed him.
D Obama changed his college life because of his friends’ help and his hard work
(   ) 10 From the passage we can see that____________.

In 1961 Obama was born in Hawaii, US. His father is an African and his mother is a white American. He grew up in Indonesia and Hawaii.

When Obama was 10 years old, he was one of only three black students at his school in Hawaii. He felt very different from most other students. White girls wanted to touch his hair. A white boy even asked him what his father was.

“I lied to them that my father was a Kenyan prince（王子）. But I kept asking myself who I am,” said Obama.

However, 37 years later, the boy made history. Obama became the first black president（总统） in US history.

This unusual background（背景） made him wonder who he was. He once turned to alcohol (酒) to help forget this question.

With the help of his friends, Obama finally turned his life around at college. His hard work made him a star at Harvard. Later, he became only the third black senator (参议员) in US history.

“Obama’s success has made Martin Luther King’s dream come true. That is: A man should not be judged （判断）by the color of his skin, but by the content of his character,” wrote ABC news.

(   ) 6 Obama was born in _______________.

A Britain       B America       C Kenya         D Indonesia

(   ) 7 There was/were _______black students besides Obama at the school where he studied when he was ten.

A no            B one               C two           D three

(   ) 8 Obama became the first black president in US history when he was ______.

A 37            B 40                C 47            D 50

(   ) 9 Which of the following is true?

A Obama’s father was a Kenyan prince.

B Obama once forgot who his father was with the help of alcohol.

C Obama was so dishonest when he was young that nobody believed him.

D Obama changed his college life because of his friends’ help and his hard work

(   ) 10 From the passage we can see that____________.

A. we could judge a person by the colour of his skin 

B. we could not judge a person by the content of his character 

C. we should not judge a person by the color of his skin 

D. we should judge a person by what he did when he was young