Here is an essay question where you have to give your opinion. Can you find out a proper thesis statement for it Introduction:

Before you can fly a plane in the sky you have to learn the ______ of flying it.

A．skill

B．technology

C．knowledge

D．ability

Can you find out the meaning of the following roots in English and give two of three words that contain each of them? 能否指出下列英语词根的含义并分别举出两三个包含这些词根的单词?

回答下列各题 Even if your child is an excellent student，you can’t expect that hewill always dutifully do his homework．The following issome useful advice for helping them deal with their homework． Set a regular time and place for study．Give homework its ownspecial time and place，and if your child is in middleor high school，let her set her own timetable． Take it step by step．Children may getoverwhelmed(压倒)by too much homework they have to do．Encourage your child to calmly work out what needs to be done andhow much time it will take，and then make a plan．Help your child break homework down into manageable steps． Help out．You shouldn’t have to do your child’s homeworkor re—teach the material covered in class．but you canhelp out by showing your interest and by encouraging independent(独立的)problem solving． Praise a job well done．Kids，no matter what their age，need to know thatthey are doing a good job．Praise them for theirsuccesses and encourage them to keep up the good work．Alittle praise will go a long way in building healthy study habits． For whom is the textmainly written?

A.Parents．

B.Teachers．

C.Headmasters．

D.Students．

Landfills

You have just finished your meal at a fast food restaurant and you throw your uneaten food, food wrappers, drink cups, utensils and napkins into the trash can. You don't think about the waste again. On trash pickup day in your neighborhood, you push your can out to the curb, and workers dump the contents into a big truck and haul it away. You don't have to think about that waste again, either. But maybe you have wondered, as you watch the trash truck pull away, just where that garbage ends up.

Americans generate trash at an astonishing rate of four pounds per day per person, which translates to 600,000 tons per day or 210 million tons per year! This is almost twice as much trash per person as most other major countries. What happens to this trash? Some gets recycled or recovered and some is burned, but the majority is buried in landfills.

How Much Trash Is Generated?

Of the 210 million tons of trash, or solid waste, generated in the United States annually, about 56 million tons, or 27 percent, is either recycled (glass, paper products, plastic, metals) or composted (做成堆肥) (yard waste). The remaining trash, which is mostly unrecyclable, is discarded.

How Is Trash Disposed of?

The trash production in the United States has almost tripled since 1960. This trash is handled in various ways. About 27 percent of the trash is recycled or composted, 16 percent is burned and 57 percent is buried in landfills. The amount of trash buried in landfills has doubled since 1960. The United States ranks somewhere in the middle of the major countries (United kingdom, Canada, Germany, France and Japan) in landfill disposal. The United Kingdom ranks highest, burying about 90 percent of its solid waste in landfills.

What Is a Landfill?

There are two ways to bury trash:

Dump--an open hole in the ground where trash is buried and that is full of various animals (rats, mice, birds). (This is most people's idea of a landfill!)

Landfill--carefully designed structure built into or on top of the ground in which trash is isolated from the surrounding environment (groundwater, air, rain). This isolation is accomplished with a bottom liner and daily covering of soil.

Sanitary landfill--landfill that uses a clay liner to isolate the trash from the environment

Municipal solid waste (MSW) LANDFILL--landfill that uses a synthetic (plastic) liner to isolate the trash from the environment .

The purpose of a landfill is to bury the trash in such a way that it will be isolated from groundwater, will be kept dry and will not be in contact with air. Under these conditions, trash will not decompose (腐烂) much. A landfill is not like a compost pile, where the purpose is to bury trash in such a way that it will decompose quickly.

Proposing the Landfill

For a landfill to be built, the operators have to make sure that they follow certain steps. In most parts of the world, there are regulations that govern where a landfill can be placed and how it can operate. The whole process begins with someone proposing the landfill.

In the United States, taking care of trash and building landfills are local government responsibilities. Before a city or other authority can build a landfill, an environmental impact study must be done one the proposed site to determine:

the area of land necessary for the landfill

the composition of the underlying soil and bedrock

the flow of surface water over the site

the impact of the proposed landfill on the local environment and wildlife

the historical value of the proposed site

Building the Landfill

Once the environmental impact study is complete, the permits are granted and the funds have bee

A．Y

B．N

C．NG

Landfills

You have just finished your meal at a fast food restaurant and you throw your uneaten food, food wrappers, drink cups, utensils and napkins into the trash can. You don't think about that waste again. On trash pickup day in your neighborhood, you push your can out to the curb, and workers dump the contents into a big truck and haul it away. You don't have to think about that waste again, either. But maybe you have wondered, as you watch the trash truck pull away, just where that garbage ends up.

Americans generate trash at an astonishing rate of four pounds per day per person, which translates to 600,000 tons per day or 210 million tons per year! This is almost twice as much trash per person as most other major countries. What happens to this trash? Some gets recycled(回收利用) or recovered and some is burned, but the majority is buried in landfills.

How Much Trash Is Generated?

Of the 210 million tons of trash, or solid waste, generated in the United States annually, about 56 million tons, or 27 percent, is either recycled(glass, paper products, plastic, metals) or composted(做成堆肥) yard waste. The remaining trash, which is mostly unrecyclable, is discarded.

How Is Trash Disposed of?

The trash production in the United States has almost tripled since 1960. This flash is handled in various ways. About 27 percent of the trash is recycled or composted, 16 percent is burned and 57 percent is buried in landfills. The amount of trash buried in landfills has doubled since 1960. The United States ranks somewhere in the middle of the major countries(United Kingdom, Canada, Germany, France and Japan) in landfill disposal. The United Kingdom ranks highest, burying about 90 percent of its solid waste in landfills.

What Is a Landfill?

There are two ways to bury trash:

Dump—an open hole in the ground where trash is buried and that is full of various animals(rats, mice, birds). This is most people's idea of a landfill!

Landfill—carefully designed structure built into or on top of the ground in which trash is isolated from the surrounding environment(groundwater, air, rain). This isolation is accomplished with a bottom liner and daily covering of soil.

Sanitary landfill—landfill that uses a clay liner to isolate the trash from the environment

Municipal solid waste(MSW) landfill—landfill that uses a synthetic(plastic) liner to isolate the trash from the environment.

The purpose of a landfill is to bury the trash in such a way that it will be isolated from groundwater, wall be kept dry and will not be in contact with air. Under these conditions, trash will not decompose(腐烂) much. A landfill is not like a compost pile, where the purpose is to bury trash in such a way that it will decompose quickly.

Proposing the Landfill

For a landfill, to be built, the operators have to make sure that they follow certain steps. In most parts of the world, there are regulations that govern where a landfill can be placed and how it can operate. The whole process begins with someone proposing the landfill.

In the United States, taking care of trash and building landfills are local government responsibilities. Before a city or other authority can build a landfill, an environmental impact study must be done on the proposed site to determine:

the area of land necessary for the landfill

the composition of the underlying soil and bedrock

the flow of surface water over the site

the impact of the proposed landfill on the local environment and wildlife

the historical value of the proposed site

Building the Landfill

Once the environmental impact study is complete, the permits are granted and the funds have been raised, then construction begins. First, access roads to the landfill site must

A．Y

B．N

C．NG

Landfills

You have just finished your meal at a fast food restaurant and you throw your uneaten food, food wrappers, drink cups, utensils and napkins into the trash can. You don't think about that waste again. On trash pickup day in your neighborhood, you push your can out to the curb, and workers dump the contents into a big truck and haul it away. You don't have to think about that waste again, either. But maybe you have wondered, as you watch the trash truck pull away, just where that garbage ends up.

Americans generate trash at an astonishing rate of four pounds per day per person; which translates to 600,000 tons per day or 210 million tons per year! This is almost twice as much trash per person as most other major countries. What happens to this trash? Some gets recycled (回收利用) or recovered and some is burned, but the majority is buried in landfills.

How Much Trash Is Generated?

Of the 210 million tons of trash, or solid waste, generated in the United States annually, about 56 million tons, or 27 percent, is either recycled (glass, paper products, plastic, metals) or composted (做成堆肥) (yard waste). The remaining trash, which is mostly unredeemable, is discarded.

How Is Trash Disposed Of?

The trash production in the United States has almost tripled since 1960. This trash is handled in various ways. About 27 percent of the trash is recycled or composted, 16 percent is burned and 57 percent is buried in landfills. The amount of trash buried in landfills has doubled since 1960. The United States ranks somewhere in the middle of the major countries (United Kingdom, Canada, Germany, France and Japan) in landfill disposal. The United Kingdom ranks highest, burying about 90 percent of its solid waste in landfills.

There Are Two Ways to Bury Trash:

Dump-an open hole in the ground where trash is buried and that is full of various animals (rats, mice, birds). (This is most people's idea of a landfill!)

Landfill-carefully designed structure built into or on top of the ground in which trash is isolated from the surrounding environment (groundwater, air, rain). This isolation is accomplished with a bottom liner and daily covering of soil.

Sanitary landfill-landfill that uses a clay liner to isolate the trash from the environment.

Municipal solid waste (MSW) landfill-landfill that uses a synthetic (plastic) liner to isolate the trash from the environment.

The purpose of a landfill is to bury the trash in such a way that it will be isolated from groundwater, will be kept dry and will not be in contact with air. Under these conditions, trash will not decompose(腐烂)much. A landfill is not like a compost pile, where the purpose is to bury trash in such a way that it will decompose quickly. Proposing the Landfill

For a landfill to be built, the operators have to make sure that they follow certain steps. In most parts of the world, there are regulations that govern where a landfill can be placed and how it can operate. The whole process begins with someone proposing the landfill.

In the United States, taking care of trash and building landfills are local governments' responsibilities. Before a city or other authority can build a landfill, an environmental impact study, must be done on the proposed site to determine:

the area of land necessary for the landfill

the composition of the underlying soil and bedrock

the flow of surface water over the site

the impact of the proposed landfill on the local environment and wildlife

the historical value of the proposed site

Building the Landfill

Once the environmental impact study is complete, the permits are granted and the funds have been raised, then construction begins. First, access roa

A．Y

B．N

C．NG