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A number of students_______ playing on the playground, but I don’t know what the exact number_______.

A. is; is B. are; are

C.is; are D. are; is

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

   When Obama was 10 years old,he was one of the 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 (说谎) to them that my father was a Kenyan prince. But I kept asking myself who I am ,” said Obama ,“And nobody believed in me at that time. ”

   However,37 years later,the boy made history. Obama became the first black president in the 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 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 he should be judged by the content of his character. ” wrote ABC news. (江苏南通)

() 5. Obama was born in .

   A. Britain   B. America   C. Kenya   D. Indonesia

() 6. There was/were black student(s) at the school where Obama studied when he was tea

   A. no   B. one   C. two   D. three

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

   A. 37   B. 38   C. 47   D. 48

() 8. Which of the following is TRUE?

   A. Obama's father was a Kenya prince.

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

   C. When he was young,Obama lied and nobody believed in him.

   D. Obama changed his college life without his friend's help or his hard work.

() 9. From the passage,we can see that.

   A. we could judge a person by the color 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

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  Air is a colorless,tasteless and invisible gas that is around us. An “empty” drinking glass and an “empty” room,in fact,are not really empty. Each is filled with air. When the glass is filled with water,the water pushes the air out of the glass.

   Air,as gas,has no definite shape,but because it is matter,it takes up space and it has weight. It is easy to show that air is something that takes up space. Stuff a piece of dry cloth into the bottom of a glass so that it will not fall out when the glass is turned upside down. Push the upside-down glass,holding straight up and down,into a jar of water till the glass is completely covered. When the glass is taken out of the water,the cloth is still dry. The air inside the glass shows that it takes up space and keeps the water from coming in.

() 1. Why air has no definite shape? Because .

   A. it's a mixture   B. it's a kind of gas   C. it is matter   D. it is nothing

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   B. both room and shape as well

   C. either shape or weight

   D. both room and weight

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   A. to take away   B. to fill with   C. to cover   D. to cut off

() 4. The writer tells us that .

   A. the experiment must be carried out in the space

   B. this kind of experiments must be done in the lab

   C. the experiment is made in the room

   D. this kind of experiments can only be done in the open air

() 5. Which of the following pictures gives us the correct result of the experiment?

(W=water,A=air,C= cloth)

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Most people know that Marie Curie was the first woman to win the Nobel Prize, and the first person to win it twice. However, few people know that she was also the mother of a Nobel Prize winner.

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