阅读理解，然后选出正确答案

　　Jacks is the name of a game that is a quite popular(流行) with children. To play jacks, you will need a small rubber ball and ten small metal objects (金属物) called jacks.

　　The rulers for this game are very simple (简单). When the game begins, you put the jacks on the floor or ground in front of you. Toss the ball up (but not too high), pick up one jack, and then catch the ball. Keep the jack in your hand and then go on picking up the other jacks one at a time. You lose your turn if you do not catch the ball, if you do not pick up a jack, or if you drop any jacks from your hand.

　　When you finish all ten jacks, you now try to do the same thing again but with two jacks at one time. This is more difficult of course. You lose your turn if you make any of the other three mistakes or if you do not pick up two jacks each time!

1．A good title (标题) for this text is________.

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A．A simple game　　　 B．Tossing a ball

C．Just two jacks　　　D．The name of a Game

2．The word “toss”in line 5 means ________ .

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A．let something fall　　　B．catch

C．throw　　　　　　　　　 D．put

3．A player picks up all ten jacks one at a time. Then he follows (按照) the rulers and finishes the second part. The whole number of times that he picks up jacks is________ .

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4．The jacks are made of________ .

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5．After you pick up the first ten jacks, the game becomes more difficult because you might make one of ________.

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　　It's important to learn about protecting（保护）our environment（环境）. Here is a 5R rules for us：

　　1. Reduce（减少）

　　If you want to reduce waste, you should use things wisely（明智地）A large number of trees being cut down to make paper. If everyone uses a little paper carelessly（粗心地）and throw out, soon we would not have any trees left. Other things are also being wasted, and people don't know what to do with the waste in big cities. So it is necessary（必要的）to reduce the waste.

　　2. Reuse（再使用）

　　You should always think of reusing the usable（可用的）things before throwing them out. Give your clothes you do not use or the ones which are too small to the poor. In a family, you may pass such clothes to younger brothers or sisters.

　　3. Recycle（循环利用）

　　Bottles, cans and paper can easily be recycled. By doing so we save lots of time and money. For example, coke cans are sent to a factory, where they are smashed fiat and melted（熔化）and the metal things are made for new coke cans.

　　4. Recover（恢复）

　　When you buy a box of apples, there may be a few rotten（腐烂的）apples, you have two choices：one is to throw the whole apples away, or you could cut off the rotten parts and use the good parts. In this way, you are recovering the eatable parts of food.

　　5. Repair（修理）

　　If one of the legs of your table is broken, you can repair it. If you want to change for better ones, it is better for you to sell the old things or give them to other people who can use them after doing some repair. It is true that North America is a“throw –away”society（社会）, but the time has come to change our way of life so that we can protect our environment. Every one of us should try our best.

根据短文内容判断句子的正误，正确的写“T”，错误的写“F”．

(1) The“Reduce”rule mainly requires（要求）us to use things wisely.

(3) The“Recover”rule mainly requires us to cover waste things with earth.

阅读理解

　　Even if you are a good high-jumper, you can jump only about seven feet off the ground. You cannot jump any higher because the earth pulls you hard. The pull of the earth is called gravity.

　　You can easily find out the pull of the earth. If you weigh (称体重) yourself, you will know how much gravity is pulling you.

　　Since there is gravity, water runs downhill. When you throw a ball into the air, it falls back down. Because of gravity you don't fall off the earth as it whirls (旋转) around.

　　Then, can we get away from the earth and go far out into space? Now you can do it, because spaceships have been invented. The spaceship will go so fast that it can escape (逃离)the earth's gravity and carry you into space.

(1) In this passage (文章), the word “gravity” means

[　　]

A. the pull of everything

B. the force (力) which attracts (吸引) the earth towards us

C. the force of attraction among things

D. the force which attracts things towards the center of the earth

(2) When you slip (滑倒)on something, you

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A. always fall down to the ground

B. sometimes fall down to the ground

C. go up into the air

D. often fall off the earth

(3) Gravity is so strong that ________

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A. it can't make you throw a ball into the air

B. it can keep everything on the earth

C. you can jump at least seven feet high

D. you can't go up into the air by spaceship

(4) Because of “gravity ”,________

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A. water flows (流) everywhere

B. we can go everywhere by ship

C. water flows downwards on the earth

D. water flows at the foot of hills

(5) We can get away from the earth by spaceship because

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A. the spaceship goes very fast

B. the earth has no gravity to the spaceship

C. the spaceship has a strange energy (能量)

D. the spaceship can go higher than any other thing on the earth