题目列表(包括答案和解析)
A.One butterfly. | B.Two butterflies. |
C.Three butterflies | D.Four butterflies |
A.They are flying. | B.They are dancing. |
C.They are playing a game. | D.They are staying under the leaves. |
A.Green Tree. | B.Rose. |
C.Green Tree and Rose. | D.Green Tree, Rose and Grandpa Sun. |
A.Rose. | B.Grandpa Sun. |
C.Rain. | D.Dark clouds. |
A.Butterflies cannot fly if their wings are wet. |
B.The four butterflies are sisters and brothers. |
C.Grandpa often helps others. |
D.A real friendship means that friends stay together when they are in trouble. |
Reading comprehension:Choose the best topic from A to F according to the meaning of each paragraph. | |
No one knows when the first house was built and who was the first one to built the house. But the houses are changing all the time. ( )1. What will the house of the future look like? Could it have gardens on its walls, or a pool with fish for dinner? Architects (建筑学家) believe that they may come true one day. The only thing for sure is the houses will be as green as possible in the future. ( )2. Many architects in the world would like to build a house like a leaf, the surface of the house collects sunlight during the day. The energy can be used to heat water, produce electricity, and even make fresh air for the room. The"root"(根) of the house is deep under the ground. It uses the soil to control the room's temperature. ( )3. Like a lizard (蜥蜴), changing color with the weather is the most important design of a lizard house. When it's in the bright sun, the cover of the house will turn white to protect it from strong heat. During dark days, it turns dark and takes in as much light and heat as possible to produce energy. ( )4. This design is perhaps for the future of food. It has a garden on the outside wall of the house. People can plant tomatoes, carrots and green tea on them. So every morning, you just need to walk outside and collect your meals. ( )5. Looking to the future isn't the only way to be green. Sometimes, the old ways of building houses can also help cut down energy use. For example, a chimney (烟囱) can be a useful air conditioner because it is easier for hot air to run out of the chimney. | |
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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.
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 |
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 |
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. |
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