() 4. Which is NOT the advantage of the machine?
A. It is good for the environment.
B. It can help to use less fresh water.
C. It can help keep the water unpolluted.
D. It can be used for drinking or cooking.

() 5. Which is the best title of this passage?
A. Protecting the Environment
B. Living Machine
C. Cleaning Waste Water
D. The Advantage of "Living Machine"

(C)
What is litter? Litter is something that has been left in the wrong place. It is an ugly thing to look at.
We've all walked along the road and seen pop cans (罐) and paper in the grass. 1A piece of paper takes thirty days to break down (分解) into little pieces. A drink bottle will take two hundred years! Litter can also hurt animals. 2Don't throw food out of a car window. Some people do so when driving the car. 3Cars hit many animals trying to get the food.
4In Virginia, litter causes 2,500 accidents every year. This is because when people throw the litter, it makes them lose control of their cars.
If you are out on a picnic, try to take everything home with you. This means the litter, too. If you have to use an outside trashcan (垃圾桶), remember to make everything out. Put the covers back on. 5Remember to take care of the litter that you have with you. Don't throw it out of the car window or into an empty field. This will help keep the Earth clean and beautiful.
从所给的选项中,选出能填入空白处的最佳选项。
A. If the trashcan is full, try to find another one.
B. And the food makes animals come toward the road.
C. Some of the litter can take hundreds of years to disappear.
D. Litter can also cause car accidents.
E. When animals try to get the food in the can, they will get hurt.
1. ______ 2. ______ 3. ______ 4. ______ 5. ______

There is only one earth. It is very 1(importance) to protect the earth, because it is our homeland. Let's care and share it. How can we 2it? I think it's our duty to protect the earth. 3protect the earth well, we must protect the environment well. Now some people have 4(start) living a green life. They are our good 5(model). Some students go to school 6bike or on foot. Some students often reuse (再次使用) water in our school. For example, after they finish 7(wash) their clothes, they usually use the waste water to water the trees and flowers. On the other hand, saving paper is very important, too. We should try to use two 8(side) of it. We shouldn't 9away the used textbooks and workbooks. We should recycle (回收利用) them. When we don't want to watch TV, we should turn it off in time. Besides, we should 10trees and flowers as many as possible. It's very important to live a green life.