Taking away a city's rubbish is a big job. Every day tracks come into a city to collect it. Most rubbish is made up of things we can't eat or use. If we kept these things we would soon have a mountain of rubbish.

    In some cities the rubbish is collected and taken outside of city to a dump. Often the city dump is placed where the ground is low or there is a big hole. The kitchen rubbish is broken into small pieces and sent into the sewage system. The sewage system takes away the used water from toilets, bathtubs and other places.

    To keep mice and flies away, some earth is used to cover the newly dumped rubbish. Later, grass may be planted on the rubbish-filled land. Finally, a house or a school may be built there, and then you'd never know that this had once been an old rubbish dump.

    In other cities the rubbish is burnt in special places. The fire burns everything but the metal. Sometimes the metal can be used again in factories where things are made of metal. The food parts of rubbish are put in special piles where they slowly change into something called humus, which looks like black earth. It is rich with the kinds of things that feed plants and help make them grow.

    Can animals be made to work for us? Some scientists think that one day animals may be taught to do a number of simple jobs. They say that in a film or on TV .We may see elephants, or monkeys, dogs, bears, or other animals doing a lot of things. If you watch carefully, you may find that those animals are always given something to eat in return(作为回报) for doing them. The scientists say that many different animals may be taught to do a number of simple jobs if they know they will get something to eat in return.

    Of course, as we know, dogs can be used to guard a house, and elephants can be used to do some heavy jobs. And we can also teach animals to work in factories. Apes(猿猴), for example, have been used in America to help make cars and scientists believe that these large monkeys may one day get in crops(收割庄稼) and even drive trains.

    There are many online food shopping sites. Things l{#blank#}1{#/blank#}CDs, books, and DVDs sell well online. But it is quite different to sell food online because people like to see food with their o{#blank#}2{#/blank#} eyes. It is very I {#blank#}3{#/blank#} for people to buy fresh fruit and vegetables. Customers like to c{#blank#}4{#/blank#} their food by its color. They also want to touch and smell it. Some people like going to the same shop to buy food with good quality. So if the food is always g{#blank#}5{#/blank#}, they will feel comfortable buying it online.

    Boxes of fruits and vegetables have been d{#blank#}6{#/blank#} to homes around Britain for a few years now. Dried or canned foods are almost the same all the time, but fresh things are not. For example, People may want to pick their own apples so they can take the o{#blank#}7{#/blank#} that look nice. Buying dried and canned food online is easier. A person can buy this kind of food on the Internet and then buy fruits and vegetables at a store or a market.

Secret to Happiness

There's a Chinese saying that goes "If you want happiness for an hour, take a nap (小睡). If you want happiness for a day, go fishing. If you want happiness for a year, become wealthy by chance. {#blank#}1{#/blank#}" Helping others by giving may be the secret to a happy, healthy life. The more you give, the more you'll gain. The key is to find a method that works for you. {#blank#}2{#/blank#}

Find your love. {#blank#}3{#/blank#}You might feel bad if you are doing something you don't like. You will feel great when you put your love into giving.

Give your time. The gift of time is often more valuable to the receiver, and more satisfying to the giver, than money. People don't all have the same amount (数量) of money, but everyone as time. {#blank#}4{#/blank#} It can be just a few hours a day, or a few days a year.

Be active. Take every chance to serve your community. You are free to choose what you want to do. Make full use of services that match your values.

{#blank#}5{#/blank#} You can easily get used to selfless giving. When you give, make sure to keep our own needs in mind. You matter, too!

All in all, by proper giving, you can gain purpose, meaning and happiness—all of the things at people look for in life but are so hard to find.

A. Don't forget about yourself.

B. Here is some advice that you can take.

C. You can give some of this time to help others.

D. If you want happiness for a lifetime, help somebody.

E. But sometimes you are not sure where money is going.

F. Your giving should not be from orders but come out of love.

Good and bad manners（礼仪） make up the social rules of a country.They are not always easy to learn because they are often not written in books.Let's see some social rules in Britain.

In the past，most British women didn't go to pubs（酒吧） because it was not considered good behavior for a woman.Now both women and men can drink freely in pubs.

Visitors to Britain often see British people wait in line in public places.It is considered impolite to get on a bus without waiting your turn in line.And if you don't wait your turn，the other people in line will probably warn you to line up loudly.

In some countries it is considered bad manners to eat in the street.However，in Britain it is common to see people having a snack while walking down the road.

British people used to be surprised to see young children in restaurants in the evening because children were not usually taken out to restaurants at night.These days children are playing a more active role and they are now accepted in many restaurants at night.

In recent years，many British companies have banned smoking in their offices and even in the whole buildings.Smoking is also banned on the London Underground，in cinemas and theaters and on most buses.It can be seen less and less in public places.It is also considered bad manners to smoke in someone's house without asking the owner.

Social rules are an important part of every country.The British have an expression for these"unwritten rules"：When in Rome，do as the Romans do.