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Unit 8 We’re trying to save the earth!
选词填空练习
A
something, solve, into, advantage, plant, one, pollute, different, instead, recycle
The air is badly polluted around us because our cities have many factories that burn coal. Every year these factories give out a large amount of black smoke 1._________ the air. Besides，there are more cars in cities now.
There are some ways 2._________ the problem. 3._________ of all，we should ask the factories to stop giving out black smoke into the air. Next，we'd better ride bikes or walk 4._________ of driving to school. The 5._________ of bike riding or walking are that it's good for health and it doesn't cost 6._________．What's more，it's a good idea to plant more trees and flowers. 7._________ trees not only makes the air cleaner，but also makes our environment more beautiful. Finally，we need to 8._________ books and paper and stop using paper napkins. That can help us cut down fewer and fewer trees.
I think everyone should play a part in solving the air 9._________.I'm sure that our actions can make a 10._________ and lead to a better future.
B
star, still, good, rest, up, how, pollution, small, see, towards
Look up at the sky at night. What can you see Before electric lights, people could often see about 2,500 different stars. Now, light fills the skies over our cities.
This is called light 1._________. Because of it, people in cities can often only see about ten 2._________! Most of the time, light helps us. We can 3._________ because of it. It gives plants energy. But light isn’t always 4._________. We need times of dark. One hundred years ago, we had those times of dark 5._________. Now the night is like day. Some scientists are worried about 6._________ this light effects(影响)our health. These scientists are studying the effects of light pollution.
Other scientists are finding ways to stop light pollution and make our lives better. For example, many street lights now have covers. The covers focus the light 7._________ the ground. They stop the light from going 8._________ into the sky. They also save energy. The covers are a 9._________ change, but they can 10._________ have a positive (正面的)effect.
C
try, back, cause, government, well, many, kill, million, from, dangerous
As you may know, coral(珊瑚)is not a plant, but an animal. However, coral reefs(珊瑚礁)around the world are in 1._________.
Here is a piece of bad news. Thailand will close one of its beaches to protect its coral 2._________ business activities for tourists. The beach is so famous that 3._________ of tourists put it on their wish lists. More than 5,000 visitors visit it a day. They arrive by boat. This does 4._________ harm to the coral reefs.
Most of the coral has died. The beach will be closed between June and September to let the coral come 5._________ to life.
Experts say that 80% of Thailand’s coral reefs have been 6._________. Too many tourists 7._________ a lot of pollution to these beaches.
An expert said the biggest problems were hotels by the beaches, boats, and plastic waste in the sea. He believed the 8._________ choice was to close the beaches forever. He said, “I hope the 9._________ can take steps to protect the coral reefs. At the same time, I also hope all of us should 10._________ our best to protect the environment around us.
D
listen, die, realize, close, special, one, different, go, stop, wise
One day a wise man was walking along the beach when he saw a young man far away picking up something and very gently throwing it into the sea. As he got 1._________, he called out to the young man, “Good morning! What are you doing ”
The young man 2._________, looked up and replied, “Throwing starfish into the sea. ”
“Why are you throwing starfish into the sea ”
“The sun is up and the water is 3._________ away. And if I don't throw them into the sea, they 4._________. ”
“But, young man, don't you 5._________ that there are miles and miles of beach and starfish all along it You can't possibly make a 6._________! ”
The young man 7._________ politely. Then he picked up another starfish and threw it into the sea, and said, “It made a difference to that 8._________. ”
There is something very 9._________ in each and every one of us. We have all been given the ability to make a difference to shape the future. We must each find our own starfish. And if we throw our starfish 10._________ and well, the world will be better.
E
fall, number, while, baby, disappear, save, freely, avoid, forest, sharp
Koalas are lovely, but the koalas in New South Wales, Australia are in great danger.
They are facing the risk of 1._________. Now, the state's government has a $34 million plan 2._________ the lovely animals.
Koalas have large ears. They have especially 3._________ claws(爪子) , which help them climb trees. Koalas live in trees. They feed on grass and other plants, and need 4._________ environments to survive.
They are marsupials(有袋动物) , meaning they carry their 5._________ in an opening of skin on the mother's stomach. The animals are native to Australia, and are described in many stories.
Over the last 20 years, the 6._________ of koalas in New South Wales has fallen by 25 percent. About 36, 000 koalas remain. The animals' numbers 7._________ in other parts of Australia, too.
As part of its plan, the government of New South Wales is setting aside nearly 25, 000 hectares(公顷) of forest where koalas will be able to live 8._________. It will also add more signs to help car drivers 9._________ koalas that walk into roadways. And, the state will build special bridges so that koalas and other wild animals can cross roads 10._________ avoiding cars and trucks.
参考答案
A. 1.into 2.to solve 3.First 4.instead 5.advantages 6.anything 7.Planting 8.recycle 9.pollution 10.difference
B. 1.pollution 2.stars 3.see 4.good 5.to rest 6.how 7.up 8.small 9.still 10.towards
C. 1.danger 2.from 3.millions 4.much 5.back 6.killed 7.cause 8.best 9.government 10.try
D. 1. closer　2. stopped　3. going 4. will die　5. realize　6. difference　7. listened 8. one　9. special　10. wisely
E. 1.disappearing 2.to save 3.sharp 4.forest 5.babies 6.number 7.have fallen 8.freely 9.avoid 10.while　

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