Probably you have seen photos of the Grand Canyon（峽谷）, the great valley in the desert country of Arizona. But you must go there yourself to feel its true size and beauty. The Grand Canyon is one of the greatest natural wonders of the world
The Colorado River formed the Grand Canyon over millions of years. Slowly, the river cut down through hard rock. At the same time, the land was rising. Today the canyon is 1.5 kilometers and 445 kilometers long. The oldest rocks at the bottom of the canyon are more than 1 billion years old. The width varies from about 200 meters to 29 kilometers across. The rim or top of the canyon is about 2,300 meters above sea level on the South Rim, and about 3,000 meters on the other side. As a result, there are different kinds of plants and animals on opposite sides of the canyon. The South Rim is dry desert country. The North Rim has tall forests.
The canyon looks different at different times of day, and in different seasons and weather. At sunrise and sunset the red, gold, brown and orange colors of the rocks are especially clear and bright. In winter, the canyon is partly covered with snow.
The view from the South Rim of the Grand Canyon is the best. Most visitors come here and stay in campgrounds or hotels. Every point along the canyon’s edge offers a different view.
The North rim of the Canyon is quieter. It takes all day to drive there from the South Rim because there is only one bridge across the Colorado River. On the way, you go through Navado Indian lands, and a colorful pink desert called “The Painted Desert”.
【小題1】The best way to feel the true beauty of the Grand Canyon is to________.

A．see its photographsB．listen to the report about it
C．watch its introduction on TVD．go there yourself and visit it
【小題2】 The scene of the canyon is ________.
A．various depending on different time and places
B．a(chǎn)lmost the same
C．various depending on different time
D．various depending on different places
【小題3】 If you want to visit the North Rim from the South Rim, you________.
A．can go there in many directionB．won’t spend much time on the way
C．can visit The Painted Desert on the wayD．needn’t go across any bridges
【小題4】 If you want to have a visit to the Grand Canyon, you’d better go to _______.
A．the North RimB．the South RimC．the bottomD．Navado Indian Lands

【小題1】D【小題1】A【小題1】C【小題1】B 

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Do you know how it is when you see someone yawn and you start yawning too? Or how hard it is to be among people laughing and not laugh yourself? Well, apparently it's because we have mirror neurons (神經(jīng)元）in our brains.
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【小題4】What is the passage mainly about?
A．Ways to find mirror neurons.
B．Problems of mirror neurons.
C．Existence of mirror neurons.
D．Functions of mirror neurons.

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A．was frightened that she had no idea what she wanted from life

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B．Their ways of making their way to the top.

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A．It’s all right to try more before settling down.

B．It’s better to take adult responsibility earlier.

C．It involves too much effort to rise vertically.

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4.What can we conclude from the article?

A．The author is envious of her parents enjoying a big house at her age.

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