题目内容

What eventually happens to the skin of the rattlesnake？

A. The snake sheds its skin.
B. The skin becomes transparent.
C. The skin hardens and releases a poisonous liquid.
D. The snake forms an additional protective skin over the original.

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Traveling can be fun and easy. A vacation trip to another country is especially 【21】 when the traveling conditions are good. Good traveling conditions 【22】 a comfortable mode (方式) of transportation, knowledge of the 【23】 language, familiarity 【24】 the customs and habits of the people in the country, and pleasant traveling 【25】 . All of us have iad nice trips 【26】 this.
Most of us have also had trips! that we would 【27】 to forget. Many conditions can pro duce a bad! 【28】 experience. For example, if the four conditions 【29】 above do not exist, we will probably have a bad experience, 【30】 at best a difficult 【31】 . Students who travel to a 【32】 country to study often have a difficult trip. They usually travel 【33】 They don't know the language of the new country 【34】 . They often arrive in the new country 【35】 a judge international airport. From the airport, they need to 【36】 their way to their school. Maybe they need to 【37】 airplanes, to! take a bus, a train, or a taxi. They need to do all this in a country 【38】 everything is unfamiliar. Later, after the experiences are 【39】 , they can laugh. But at the 【40】 , they feel terrible.
【21】

A. happy
B. enjoyable
C. amusing
D. favorable

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15. Why do American young people usually leave their families at eighteen or nineteen？A. Their working place is too far away from their families.
What does the passage mainly discuss？

A. The speaker's opinion about American society.
B. The relationship between American parents and their children.
C. American young people's independence.
D. American social values.

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What is true of the Lincoln-Douglas debates？

A. They were popular only in Illinois.
B. They took place during the presidential campaign.
C. They made Southern Democrats angry.
D. There was a highlight of the senate race.

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How do naturalists regard the rattle of the rattlesnake？

A. They believe that the snake is able to control the rattle.
B. They believe that the snake is unaware of its rattle.
C. They believe that the rattle is a nervous action.
D. They believe that the rattle is a deliberate warning.

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What eventually happens to the skin of the rattlesnake？

A. The snake sheds its skin. B. The skin becomes transparent. C. The skin hardens and releases a poisonous liquid. D. The snake forms an additional protective skin over the original.

15. Why do American young people usually leave their families at eighteen or nineteen？A. Their working place is too far away from their families.What does the passage mainly discuss？

What is true of the Lincoln-Douglas debates？

How do naturalists regard the rattle of the rattlesnake？

A. The snake sheds its skin.
B. The skin becomes transparent.
C. The skin hardens and releases a poisonous liquid.
D. The snake forms an additional protective skin over the original.

15. Why do American young people usually leave their families at eighteen or nineteen？A. Their working place is too far away from their families.
What does the passage mainly discuss？