[英语四级2021年12套听力]2021年12月英语四级听练习题

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【篇一】2021年12月英语四级听练习题

　　Soils

　　There are many different kinds of soils. Different soils have different types of rock and minerals in them. Some soils have more water in them than others. Some soils might have more plant and animal material in them, too.

　　Different kinds of soils are found in different parts of the world. There are several kinds of soils found in the United States. In some areas, the soil has a lot of clay. Other soils are very sandy. Loam is a kind of soil that has a good mixture of clay and sand.

　　In some places, soil layers are very thick. Lots of plants grow in places with a thick soil layer. In dry and windy places soil layers are much thinner. Layers of soil on mountains are thin because gravity pulls the soil downhill.

　　The type of soil in a particular place affects what kinds of plants can grow there.

　　Useful Words:

　　1. clay 黏土，泥土

　　2. loam 肥土

　　3. layer 层

　　4. gravity 地心引力，重力

　　5. downhill 往下

【篇二】2021年12月英语四级听练习题

　　How can you tell which direction? By day, look for the Sun. It is in the east in the morning and the west in the afternoon. At night, use the Big Dipper to help you find the North Star. It would be better to bring a compass because its needle always points north.

　　How do you know how far you have gone? You could count every step. Each step is about two feet. You’d better wear a pedometer which is a tool that counts steps. If you know where you started, which direction you are heading, and how far you have gone, you can use a good map to figure out exactly where you are.

　　Today there is a new way for travelers to figure out where they are. It is the GPS. It has 24 satellites that orbit the earth and constantly broadcast their positions. Someday you may carry a small receiver as you hike and use GPS to find out if you are there yet!

　　Useful Words and Expressions:

　　1. dipper北斗七星

　　2. compass 罗盘

　　3. pedometer 步数计

　　4. GPS= Global Position System全球定位系统

　　5. orbit 轨道，绕……轨道而行

　　6. receiver 接收器

【篇三】2021年12月英语四级听练习题

　　What are the parts of a flower?

　　Flowers can have male parts and female parts. The female parts make eggs that become seeds. The male parts make pollen. Pollen is a powdery material that is needed by the eggs to make seeds. To make seeds, pollen and eggs must come together. The wind, insects, and birds bring pollen to eggs. Many animals love flowers’ bright colors. They also like a sugary liquid in flowers. This is called nectar. While they drink nectar, pollen rubs off on their bodies. As they move, some of this pollen gets delivered to the female flower parts.

　　Over time, the female parts turn into fruits that contain seeds. Animals often eat the fruits and the seeds pass through their bodies as waste. The animals do no know they are working for the plants by planting seeds as they travel to different places!

　　Useful words and Expressions:

　　1. flowering 开花的

　　2. pollen 花粉

　　3. powdery 粉状的

　　4. sugar 含糖的，甜的

　　5. nectar花蜜，甘露

　　6. rub 磨擦

2021年12月英语四级听练习题.doc

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