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Passage 1
Protecting wetlands
Wetlands are a very special kind of area. Wetlands are a kind of aquatic, or water biome – but they are not just water. As their name suggests, wetlands are areas of wet land. Wetlands often appear around lakes, rivers or oceans. The water in wetlands is not very deep.
Wetlands cover only six percent of the earth’s land surface. And they are home to many endangered plants and animals. But wetlands are more than areas of wet plants and dirt. Wetlands do many important things for the natural environment.
Passage 1
Protecting wetlands
Passage 2
Ⅰ. 1st importance: Wetlands can .
2nd importance: Wetlands can .
3rd importance: Wetlands can .
provide food and cover for wild life
Protecting wetlands
As we said, wetlands are home to many animals. Many fish lay their eggs in wetlands. The baby fish grow safely among the plants. Many birds use wetlands as areas to rest as they travel across continents. Many other animals like to live in wetlands because there are fewer predators. For these animals, wetlands are an important source of food, protection and places to live.
Wetlands also control pollution. Many harmful chemicals can enter water systems. These chemicals can kill plants and animals. But the plants in wetlands can reduce this pollution. The wetlands stop harmful chemicals before they can wash into rivers, lakes and oceans. They act as a kind of filter. Wetlands also control the amount of good chemicals in the water. Even good chemicals can cause problems, if there is too much of them. The plants in wetlands keep the levels of these chemicals balanced.
Wetlands can also stop flooding. The plants in a wetland slow down flowing water. When rainwater flows cross the land it can quickly fill lakes and rivers. But wetlands take in much of this water and release it slowly. This stops flooding.
Passage 2
Protecting wetlands
Passage 2
( )1. What does the underlined word “filter” mean in the passage?
A. something that can cause death
B. something used in chemistry
C. something that can move something harmful away to make it clean
D. something that is put on the soil to make plants grow
Protecting wetlands
Passage 3
Ⅰ. ( )1. Why can’t wetlands support life?
A. Wetlands are polluted.
B. Warmer temperatures are drying wetlands.
C. Many wetlands were privately owned.