阅读理解。

Have you ever wondered how and why a fall leaf changes color? We first have to understand what leaves are and what they do.

Leaves are the world’s food factories. Plants take water from the ground and take CO2 from the air. Plants use sunlight to turn water and CO2 into glucose(葡萄糖). Glucose is a kind is a kind of sugar. Using it as food, plants get energy and grow. Plants using sunlight to turn water and CO2 into sugar is called photosynthesis(光合作用). ChlorophyII helps photosynthesis. It gives plants their green color.

As summer ends and autumn comes, the days get shorter and shorter, and trees “know” to begin getting ready for winter.During winter, there is not enough light or water for photosynthesis. Trees rest during this time and live on the food they store during the summer. They begin to shut down their food-making factories.As the green chlorophyII disappears from the leaves, we begin to see yellow and orange leaves. These colors have been in the leaves all the time. We just can’t see them in the summer, because they are covered up by the green chlorophyII.

The bright reds and purples in leaves are made mostly in autumn. In some trees, glucose is caught in the leaves after photosynthesis stops. Sunlight and the cool nights of autumn turn this glucose into a red color. The brown color of trees is made from waste left in the leaves. It is mixture(混合物) of all these things. It makes the beautiful leaves during autumn.

根据短文内容选择最佳答案。

1.The underline word “chlorophyII” in the passage means “_________” in Chinese.

A. 胡萝卜素 B. 叶绿素 C. 氯霉素

2.When they rest in winter, trees live on the food they store during the _________.

A. summer B. autumn C. winter

3.Which of the following is not true according to the passage?

A. Glucose is a kind of sugar and plants use it as food for energy and growing.

B. Leaves turn red because sunlight and the cool nights of autumn turn glucose into a red color.

C. We can’t see yellow or orange leaves in summer because the two colors are not in leaves.

4.What’s the main meaning of this passage?

A. What’s photosynthesis?

B. How and why leaves change colors?

C. Different kinds of leaves.

阅读与表达,阅读短文,根据其内容回答问题。

Body language is one of the most powerful means of communication, often even more powerful than spoken language. People around the world show all kinds of feelings, wishes and attitudes that they might never speak aloud. It is possible to ―read‖ others around us, even if they do not want us to catch their unspoken communication. Of course, body language can be misread, but many gestures and actions are common.

The most common facial expression is, of course, the smile – its function is to show happiness and put people at ease. It does not always mean that we are truly happy, however. Smiles around the world can be false, hiding other feelings like anger, fear or worry. There are unhappy smiles, such as when someone ―loses face‖ and smiles to hide it. However, the general purpose of smiling is to show good feelings.

From the time we are babies, we show unhappiness or anger by frowning (皱眉头). In most places around the world, frowning and turning one’s back to someone shows anger. Making a fist (拳头) and shaking it almost always means that someone is angry.

How about showing that I am bored? Looking away from people or yawning will, in most cases, make me appear to be uninterested. However, if I turn toward and look at someone or something, people from almost every culture will think that I am interested.

Being respectful to people is subjective, based on each culture, but in general it is probably not a good idea to give a hug to boss or teacher. In almost every culture, it is not usually good to stand too close to someone of a higher rank (等级). Standing at a little distance with open hands will show that I am willing to listen.

With so many cultural differences between people, it is great to have some similarities in body language. We can often be wrong about each other, so it is an amazing thing that we understand each other as well as we do!

1.What is even more powerful than spoken language according to the passage?

2.What is the most common facial expression?

3.How do babies normally show their anger?

4.What is not good to do when you stay with someone of a higher rank?

5.What does the writer mainly want to tell us

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