When the weather is hot, you go to a lake or an ocean. When you are near a lake or an Ocean, you feel cool. Why? The sun makes the earth hot, but it cannot make the water very hot. Although the air over the earth becomes hot, the air over the water is still cool. The hot air over the earth goes up. Then the cool air over the water moves in and takes the place of the hot air.

    Then you may ask, "Why is the ocean full of salt?" Scientists will say that the salt comes from the rocks. When the rocks get very hot or very cold, they crack (爆裂). Rain falls into the cracks. The rain then carries the salt into the earth and into the rivers. The rivers carry the salt into the ocean. And then you may doubt, "But the ocean does not get more salty every year. Scientists are not sure about the answer to this question.

    We know a lot about our world. But there are still many answers that we do not have, and we are curious about them.

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When we see a cigarette box, we'll see "Smoking is harmful to your health" on it. Children are not allowed to smoke by their parents or teachers. But in many countries smoking is becoming a bigger problem for young people. Most smokers start in their teens or earlier.

{#blank#}2{#/blank#}

Some students think smoking is very cool, and they can see many people smoking around them. They want to have a try.

{#blank#}3{#/blank#}

"But young people start smoking early, they will probably get addicted to nicotine（尼古丁）. And it will be very hard to give up later on,"said a professor.

{#blank#}4{#/blank#}

What can we do to make them stop smoking? Some people think we can make a law. Teenagers under 18 are not allowed to smoke, or they should be fined(罚款). Parents should give up smoking. They can set an example to their children .

{#blank#}5{#/blank#}

"Every year about eight million people die of ". Every year about eight million people die of smoking. And if people keep smoking, the number will increase（增长） 10 million a year from now on," said the World Health Organization. So we must learn and tell others about the danger of smoking. 

Do You Have a Soccer Ball?

Frank Brown

I don't have a soccer ball, but my brother Alan does. We go to the s{#blank#}1{#/blank#} school and we love soccer. We play it at school with our friends. It's r{#blank#}2{#/blank#}.

Gina Smith

Yes, I do. I have two soccer balls, three volleyballs, four basketballs and five baseballs and bats. I love s{#blank#}3{#/blank#}, but I don't play them—I only watch them on TV! 

Wang Wei

No, I don't. Soccer is d{#blank#}4{#/blank#} for me, so I never play it. I like ping-pong. It's easy for me. I have three ping-pong balls and two ping-pong bats. A{#blank#}5{#/blank#} class, I play ping-pong with my classmates.

要求：（1）要点齐全，语法正确，逻辑通顺，语句优美，60词左右。（2）文中不得出现真实人名和校名。

How do people from all over the world spend their free time? Let's have a look.