What is the sky? Where is it? How bright is it? What lies above it? These questions are difficult to answer, aren’t they?

Is the sky blue? The sky has no color. We know that there is air around the world. When planes fly, they need air to lift their wings. Planes can’t fly very high because the air gets thinner when they go up higher. If we go up about 1,200 kilometers from the earth, we’ll find no air there.

When we talk about the sky, we usually mean the atmosphere around the earth. It is like a very thick “cover” over the earth and keeps it warm. Without the “cover”, the earth would be a very cold place and nothing could live on it.

Looking up above us, you will see the blue sky with white clouds. It is usually light blue, but the sky would be dark blue if you go to the top of the highest mountains. And you will see fewer clouds between you and the sun.

And if you sit in a spaceship high above the earth, there is no air at all. The sky would be so dark that its color would be black.

Sometimes the sky doesn’t look blue. When the sun rises and falls, you will see red, orange, and other colors in the sky. These are the most beautiful moments of the day.

Now you may understand that we see colors because the air scatters (散射) the sunlight. Light travels through the air. Without air, there would be no light and no colors.

1.Planes can’t fly very high because ____________.

A.there is air around the world

B.the air gets thinner when they go up higher

C.it’s warmer in the sky

D.the air gets thicker when they go up higher

2.We can see colors of the sky because ____________.

A.the sun rises and falls every day

B.the sky has lots of colors

C.the air scatters the sunlight

D.the sunlight has many colors

3.Which of the following is TRUE?

A.There is little air without light and colors in the sky.

B.The sky will look red, orange and other colors at noon.

C.The sky has only one color when the sun rises and falls.

D.The sky is dark blue if you go to the top of the highest mountains.

阅读表达。阅读下面短文并回答问题(请注意词数要求)。

On Sunday, April 22, people all over the world take time out to appreciate(珍惜)the earth that we all share. It’s Earth Day, a special day to learn about our planet(星球)and how to take care of it.

On Earth Day, some people listen to speeches about the environment. Others help clean up their offices or save water and electricity at home. Your parents may even decide to take a day off from driving their cars.

The idea for Earth Day came from a US Senator(参议员), who was worried about pollution and the health of plants and animals. And the idea quickly caught on(流行起来). In 1970, the first Earth Day was celebrated. More than 20 million people in cities all over the US took part in. Since then, Earth Day has been used to educate people about their role in taking care of our planet.

Now, Earth Day has become a global celebration. In 1990, 200 million people from 140 countries took part in clean-ups, tree planting and other environmental events on Earth Day.

1.When is Earth Day? (No more than 2 words)

________________________________________________.

2.Who came up with the idea for Each Day? (No more than 3 words)

___________________________________________________.

3. How many people celebrated the flint Earth Day in 1970? (No more than 4 words)

_____________________________________________.

4.Is Earth Day popular around the world now? (No more than 3 words)

____________________________________________.

5.What has Earth Day been used to educate people about their role? ( No more than 6 words).

_______________________________________________.

任务型阅读,阅读表达

According to a new survey, student safety has become a big problem. Now in many big cities of China, many schools start a new lesson: self-protection. Students like this lesson because there are no exams or boring classes. And they can learn how to save lives and know how to stop danger before it really happens.

Lin Li, a teacher from Yang ma, gives young students advice on how to deal with danger.

If you are in a traffic accident

If a car hurts you, you should. remember the car number. If it is a bicycle, try to call your parents before you let the rider go. This is because you don't know how seriously you are hurt.

If it is raining hard and there is lightning

Don't stay in high places and stay away from trees.

When there is a fire

Get away as fast as you can. Put wet things on your body and try to find an exit. Do not take the lift.

If someone is drowning

If you can't swim, don't get into the water. Cry out for help.

Remember that danger is never as far away as you think. Take care of yourself at all times!

If you are robbed (抢劫)

Keep calm. If you cannot cry for help or run away, give the robber your money. Try to remember what the robber looks like and tell the police later.

Best title:1.

Danger

What to do

2.

If hit by a car, you’re supposed to

3.

If hit by a bike, call your parents.

Raining with lightning

Stay at low places and keep away from trees.

Fire

Don’t take the lift and find an 4. as fast as you can.

Drowning

If you can’t swim, just shout “Help!”

Robbery

◆Keep clam.

◆Remember the robbers 5.and tell the police later.

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