高中英语人教版必修课本配套阅读 必修一 U4

戴氏VIP 练习四 1 Jupiter’s Moons and How They Travel The many moons of Jupiter travel around the planet in different directions (方向). Jupiter is the largest planet in our solar system. Over the years, scientists have found that Jupiter has its own small solar system. Earth has one moon. Jupiter has at least sixteen and probably more. Since there are so many moons, scientists began to number them. The numerals (numbers) tell the sequence, or order, in which the moons were found. They were slower to name the moons. All of Jupiter’s moons now have a name as well as a number. The first five moons to be discovered are known as the “inner moons”. But they are not the closest to the planet. The closest is only 127,600 kilometers away from Jupiter. All the inner moons circle the planet in counter-clockwise direction, that is, opposite of the hands of a clock. Jupiter’s middle group of moons are at least 11,100,000 kilometers from the planet. They also move in a counter-clockwise motion (moving). The four farthest moons are at least 20,700,000 kilometers away. These are called “outer moons”. They circle in a clockwise motion. How many more moons do you think will be discovered？ 1.What does “solar system” in this article mean？______ A. 银河系B. 宇宙空间C. 流星雨D. 太阳系 2.Things that travel in the same direction as the hands of a clock are said to be traveling in a______. A. clockwise direction B. counter-clockwise direction C. same direction D. different direction 3.Jupiter’s _____group of moons travel in a clockwise direction. A. planets B. inner C. middle D. outer 4.The numbers given to Jupiter’s moons tell ______. A. the order in which they were discovered B. the order in which they travel C. the order of their distance from Jupiter D. the order of names 5.According to the passage，which of the following statements is true？ A. None of Jupiter’s moons have names. B. Most of Jupiter's moons circle clockwise. C. Jupiter's inner moons were discovered first. D. Jupiter is the nearest planet to the earth. 6.How far away are the middle group of moons from Jupiter？ A. It’s not mentioned. B. 11,100,000 kilometers away. C. 127,600 kilometers away. D. 20,700,000 kilometers away.

2 WHY IS THE SUN IMPORTANT？ The sun is a huge, hot, bright star. It is important because without it there would be no life on Earth. The sun gives us light and heat. All living things need light and heat from the sun to live. Plants need light and heat to grow. They use the light from the sun to make food. We cannot make our own food, but plants can. All the food we eat comes from plants in a food chain(链)which starts with the sun. For example,

Animals need sunlight, too. Just like us, their food comes from a food chain which begins with the sun and the plants. sun→ leaf→ caterpillar(毛虫)→bird sun→ seaweed(海藻)→small fish→ whale(鲸) Sunlight means we can see during the day. If there was no sun, it would be dark all the time. Even when the sky is cloudy, the sunlight is very strong and it shines through the clouds. 1.Which words tell us what the sun is like？ A. Huge. B. Hot. C. Bright. D. All above. 2.What are the two main things the sun gives us？ A. Light and heat. B. Heat and eggs. C. Corn and light. D. Wheat and bread. 3.Why can we still see during the day when the sky is cloudy？ A. Because we can see all day and all night. B. because the sun can't give us light all day long. C. Because the sunlight can shine through the clouds. D. Because we can't see at night. 4.All the food we eat comes from ______. And it starts with the _____. A. plants; earth . a food chain; sun C. food; sun D. plants; star 5.In what way do you think the sun cannot be harmful(有害的)？ A. The sun can do harm to your eyes and skin. B. It can make rivers too dry. C. Without it there would be no life on Earth. D. Hot sun on dry land can cause fires.

3 Most animals only have animals of a different kind for food. But sometimes two kinds of animals come together in a partnership (伙伴关系) which is good for them. You may have noticed some birds on the backs of sheep. This is not because they want a ride, but because they find easy food in the parasites (寄生虫) on sheep. The sheep let the birds do so because they can stop the parasites from troubling them. So though they can do with it by themselves, they can do better together with each other. Sometimes an animal has a plant partner. The relationship develops until the two partners cannot do without each other. This is so in corals of the sea. Inside their bodies they have very small plants, which act as “cleaners”, taking the useless things from the coral and giving oxygen in return. That is what the animal needs to live. If the plants are killed, or are even kept from receiving light so that they cannot live as usual, the corals will die. 1.Some birds like to sit on a sheep because ________. A. they can eat its parasites B. they enjoy traveling with the sheep C. they can’t live without its parasites D. they want to find the warm place 2.The underlined word “they” in the first paragraph means _________. A. birds and parasites B. birds and sheep C. parasites and sheep D. birds, parasites and sheep 3.We learn from the passage that corals need plants for _______. A. friends B. light C. food D. oxygen 4.The Chinese for the word “oxygen” is _________. A. 氧气B. 空气C. 废气D.二氧化碳 5.What is the second paragraph mainly about? A. Some animals and plants cannot live without each other. B. Some animals and plants cannot develop their friendship easily. C. Some plants eat each other. D. Some animals live better together.