题型:任务型阅读 题类:常考题 难易度:普通
冀教版初中英语八年级下册Unit 2 Lesson 8 Why are plants important? 同步练习
Plants are very important. Plants can make food from air, water and sunlight. Animals and man cannot make food from air, water and sunlight. Animals can get their food by eating plants and other animals. Man gets his food by eating plants and animals, too. So animals and man need plants in order to live. This is why there are so many plants around us.
There are two kinds of plants: flowering plants and nonflowering plants. Almost all the trees around us are flowering plants. You can know some trees from their flowers and fruit. Nonflowering plants do not grow flowers. You can not see many nonflowering plants around you.
If you look carefully at the plants around you, you will find that there are many kinds of plants. Some plants are large and some are small. Most of them are green. Thanks to the plants around us, we can live on earth.
Tornadoes(龙卷风) are whirlwinds(旋风) with speeds of up to 400 km per hour. In Britain, there were very few tornadoes in the past. Now, there are more than 50 tornadoes a year. Tornadoes are only one sign of the world's climate changes. There are many others. The number of thunderstorms is increasing, and there are more floods in some parts of the world, and there's much less rain in others. Scientists still do not know enough about the reasons for these climate changes. Most scientists think human activities are the problem.
Cutting down trees, burning too much oil, and the increase in the number of cars are some of the things that cause the problems. Global(全球的) temperatures are rising because of these things. Scientists believe that if the temperatures continue to rise, the ice at the poles will melt(融化) .
If the ice melts, sea levels will rise. Some islands might disappear completely. All this means that unless we do something to stop global warming now, there may be many other dramatic changes in the future.
Information Card |
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Signs of climate changes |
*Tornadoes *The increasing number of {#blank#}1{#/blank#} *More floods in some parts of the world while {#blank#}2{#/blank#}in others |
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{#blank#}3{#/blank#}for climate changes |
Human activities |
*Cut down trees {#blank#}4{#/blank#} *The increasing number of cars |
What will happen if we don't take action |
*Global warming *The ice will melt {#blank#}5{#/blank#} *Some islands will disappear completely |
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