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Choose a wheeled suitcase and a small backpack. The wheeled saves(避免)you from carrying heavy baggage. The small backpack lets you keep items close.
Put your necessary travel items in the backpack. They things like money, medicine and a mobile phone. If you have space, add some items as well as a book, a snack and sunglasses.
Bring less. You’ll have to carry your bags airports, train stations and city streets, so you don’t want to pack more items than necessary. Leave home any items you may not need during your trip.
Don’t your suitcase. You are sure to buy at least a few souvenirs during your trip, and leaving space for them in your suitcase will reduce your travel stress.
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resources(资源) on Earth. To protect these resources, we need to keep the air clean and the water
drinkable. We need to keep the soil (土壤)healthy. How do we do that?
Protect the land
The soil that covers fields and farms provides much of the food we eat. Human activities such as
plowing(耕) fields, mining(采矿), and building highways can destroy (破坏)the land. Erosion happen
when wind and water carry away the soil. Soil erosion can turn rich farmland into a desert wasteland.
So does this mean we shouldn't build a highway or plow a field? Of course not. But it does mean we
might think about Earth-friendly ways of doing those things.
Today farmers plow their fields in different ways to prevent erosion. They try to use less water for their
crops. They keep animals from eating the growing grass in just one area. Farmers also plant trees to
prevent erosion from happening.
Save the Trees
Another human activity that damages the land is deforestation(采伐森林). People take away a large
number of trees from a forest. Millions of square kilometers of forest disappear each year. When this
happens, many plants and animals lose their places to live. They may die out, or become very few.
Scientists haven't even discovered all the living things in the forest. We may be losing some without even
knowing they are there. Trees absorb (吸收)and use carbon dioxide (二氧化碳)when they make food.
Environmentalists encourage careful management of the forests. They ask people to replant trees after
they cut down the forest.
Recycle, Reuse, Reduce
People throw a piece of paper into the wastebasket after using it. The paper becomes trash. Where
does the trash go next? Much of our trash ends up in landfills(垃圾填埋地). They take up valuable land
and sometimes pollute the water, air, and land around them. More than a third of the trash in landfills is
paper. Recycling, reusing, and reducing what you throw away can cut down on the need for more landfills. In fact, we can recycle about eighty percent of household trash.
B. Cutting down trees and farming.
C. Wind and rain carrying away soil.
D. Building highways on the farmland.
B. To encourage careful management of the forest.
C. To take away a large number of trees from the forest.
D. To keep good places for animals and plants to live in.
B. Very little.
C. One third.
D. Four fifths.
B. To tell people how to protect natural resources.
C. To show how the lands are destroyed by people.
D. To discuss ways of protecting animals and plants.
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| Computer games are very popular. It is natural for people to want to 1 , so playing against a computer or against a friend on the computer can be 2 to stop. "Just one more game," often turns into another game, then another. Computer games do have their 3 . They are excellent for training hand / eye coordination (协调). Surgeons (外科医生) who played computer games as children are often more skilled. Computer games can also be great for teaching students. The students are open to learning while playing. They can study for longer than a 4 would be able to teach.Students can also learn at their own speed and not feel pressured to match classmates. And with computers you can 5 a task as many times as you like. The more you do this, the better you will get, until you can do it perfectly. But like anything else in life, things should be balanced. Too much time on the computer can 6 your eyes. Regular breaks are needed. If students cannot 7 playing computer games, they won't do as well in other areas in their life--not just schoolwork, but in developing important social skills such as how to talk with people and how to work with others as part of a 8 . And if they are 9 taking regular exercise,their health will become worse. Computer games have their place, but people must also remember it is important to 10 a balanced lifestyle. | ||||
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Computer games do have their 3 . They are excellent for training hand /eye coordination (协调). Surgeons(外科医生) who played computer games 4 children are often more practical . Computer games can also be 5 for teaching students. The students are open to learning while playing. They can study for longer than a 6 would be able to teach . Students can also learn at their own speed and not feel 7 to match classmates. And with computers you can 8 a task as many times as you like . The more you do this, the better you will get, 9 you can do it perfectly .
But like anything else in life, things should be 10 . Too much time on the computer can 11 your eyes . Regular breaks are needed. If students cannot 12 playing computer games , they won’t do as well in other areas in their life-not just schoolwork, 13 in developing important social skills such as how to talk with people and how to work with others as part of a 14 . And their health will become worse if they are 15 taking regular exercise.
Computer games have their place, but people must also remember it is important to have a balanced lifestyle.
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Computer games are very popular. It is natural for people towant to 1 , so playing against a computer or against a friend on the computer can be 2 to stop . “Just one more game ,” often turns into another game , then another .
Computer games do have their 3 . They are excellent for training hand /eye coordination (协调). Surgeons(外科医生) who played computer games 4 children are often more practical . Computer games can also be 5 for teaching students. The students are open to learning while playing. They can study for longer than a 6 would be able to teach . Students can also learn at their own speed and not feel 7 to match classmates. And with computers you can 8 a task as many times as you like . The more you do this, the better you will get, 9 you can do it perfectly .
But like anything else in life, things should be 10 . Too much time on the computer can 11 your eyes . Regular breaks are needed. If students cannot 12 playing computer games , they won’t do as well in other areas in their life-not just schoolwork, 13 in developing important social skills such as how to talk with people and how to work with others as part of a 14 . And their health will become worse if they are 15 taking regular exercise.
Computer games have their place, but people must also remember it is important to have a balanced lifestyle.
1. A．win B．lose C．fight D．race
2. A．easy B．necessary C．difficult D．natural
3. A．rules B．advantages C．disadvantages D．mistakes
4. A．to B．between C．for D．as
5. A．good B．bad C．interesting D．necessary
6. A．teacher B．parent C．doctor D．computer
7. A．excited B．pleased C．stressed D．willing
8. A．make B．practice C．put off D．discover
9. A．when B．until C．after D．while
10. A．planned B．developed C．balanced D．discussed
11. A．break B．hurt C．relax D．close
12. A．enjoy B．start C．stop D．keep
13.A. but C. and C. or D. though
14. A．family B．game C．match D．team
15. A．often B．no longer C．always D．still
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