阅读与回答问题

Playgrounds offer kids fresh air, friends, and exercise. However, each year, more than 200,000 kids go to hospital because they are hurt in one way or another when playing on the playground. So what can we do to improve the situation?

We should make sure the playground is safe for the children. It should be soft and thick enough, so when the children fall, they won't hurt too much. Things like water, rocks or broken glass might cause danger to the kids. Cleaners should check the playground from time to time and clear away these dangerous things. In fact, children themselves also need to help keep the playground clean and safe. That means each time after playing they should pick up the rubbish they've produced. If someone finds there is something wrong with the equipment (设施), he should report to the keeper of the playground. so people will come to fix it.

Teaching kids how to play safely is also very important. If they know the rules of the playground. they won't get hurt easily. For example, they should never push when others are on seesaws or swings. If someone is going to jump off some equipment, he should first look down to make sure no other kids are in the way. Of course, wearing right clothes may also help to keep safe. Clothes with strings (绳) can get caught on equipment which may hurt the kid badly.

In short, our kids can both enjoy themselves and be safe if we are working together to improve the situation. 。

1.What things might cause danger to the kids on the playground?

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2.When a kid find something is wrong with the equipment , what should he do?

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3.Why should we teach kids how to play safely on the playground?

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4.What kind of clothes can be caught on equipment?

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5.What's the passage mainly about?

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Sand is a common sight in the world. But you might not know that sand is also a useful resource (资源).

Sand is the second most-used resource in the world after water, the BBC reported. However, the UN said that sand is not limitless and that we might be running out of it.

Sand is made up of very small pieces of rock, soil and minerals (矿物质). It can take tens of thousands of years to form.

But now we are using sand more quickly than it is being formed. According to the BBC, we use about 15 billion tons of sand every year to build houses, roads and other things.

People also put sand in the sea to make new islands. Singapore, for example, is now 20 percent bigger than it was in 1965. Palm islands are three large man-made islands in Dubai, United Arab Emirates. They took 94 million cubic meters of sand to build.

If people keep using this much sand, it will run out in many places. For example, Vietnam may run out of construction (建造) sand by 2020, Live Science noted.

Since people need so much sand, they are trying to mine (开采) more of it. But this is bad for the environment. Mining sand may cause beaches to disappear and more floods to happen in places close to the sea. Also, this may affect the habitats (栖息地) of many plants and animals.

1.What does the story tell us about sand?

A.It can only be found on beaches. B.It is the most-used resource in the world.

C.It can never be used up. D.It can be used to build houses.

2.According to the passage, which country is using sand to build islands?

A.Singapore and Vietnam. B.Singapore and United Arab Emirates.

C.Britain and America. D.United Arab Emirates and Vietnam.

3.Every year, we use about________tons of sand.

A.94 million B.20 billion C.20 million D.15 billion

4.We are running out of sand because________.

A.there is only a little sand in the world B.we are using sand too quickly

C.we cannot mine enough sand D.our environment is badly polluted

5.In places close to the sea, more floods will happen because of________.

A.overmining of sand B.climate change

C.the increasing size of certain islands D.the death of some plants

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