This week, our topic is pollution. What are the answers to all of our pollution problems? We asked two experts to give their views.

    ◇Forest Smith is a member of Green First, an environmental group.

    Our future on the Earth looks very bad. We are dumping waste on our land. We can't breathe the fresh air. The sea is polluted too.

    I visited some relatives recently in a small village. They grow their own food and cycle everywhere. They are not wealthy, but they are happy and healthy.

    We must close the factories producing useless products. That will reduce rubbish and air pollution. We must recycle more, give up all cars, and improve public transport.

    A big problem is overpopulation in big cities. We must give up big cities and factories, and go back to a simple way of life.

    ◇John Green is a scientist at a university.

    Things are not as bad as Forest says. We'll have a bright future. We don't need to give up cars but we need to invent better, cleaner engines.

    This won't stop the problem of traffic jams. So we need better public transport. We should also recycle more.

    But some things are getting better. My sister returned last month after living abroad for five years. She said, “Our old neighbourhood doesn't look the same as before－it is cleaner and greener now.”

    In a word, science has brought many improvements to our life.

{#blank#}1{#/blank#} Wow! I'm in a beautiful town. There are rivers and lakes all over the town. The restaurant is between two rivers. How can I get there?

{#blank#}2{#/blank#} Look at the map. Yuhu Park is here. It's far from here. We can take a bus to get there. Let me see which bus to take. Oh, there aren't any bus stops near here. Look! A subway station. Let's go!

{#blank#}3{#/blank#} I love Beijing. I want to see different Hutongs. I don't want to take the bus or subway. And I don't want to take a taxi or walk, either. How can I go around the city by myself?

{#blank#}4{#/blank#} Guilin is famous for its water and mountains. I'm going there this vacation. It's about 3000 kiloetres away from here. It's so far. I want to get there quickly.

{#blank#}5{#/blank#} Bank of China is near. I can walk along this street and turn right. It's down Center Street on the left. It's just ten minutes' walk.

    Welcome to Xiangshan City!

    Xiangshan City is an interesting place to visit. (1)It is a beautiful city with many old buildings.

    Take a walk through the center of the city on Main Street. Look first at the Xiangshan City Hotel. It is on the corner of Main Street and Park Avenue. It is about 150 years old and people like to stay there. There is an interesting old building across from the hotel. This is the old post office. Now it is a store for books and videos. There are many places to eat on Main Street. You can have lunch or dinner in one of these places. There is a park between Main Street and Bridge Street. You can sit on a bench(长凳)in the park. (2)It's nice and quiet, nd you can enjoy the clean air and sunshine.

    You can also take a walk down Park Avenue. Look at the old buildings and interesting stores on this street.

    Friendship is one of the greatest pleasures that people can enjoy. {#blank#}1{#/blank#}A true friend does indeed find pleasure in our joy and share sorrow in our grief. In time of trial, he or she is always at our side to give us his or her help and comfort.

    {#blank#}2{#/blank#}We must choose someone who has a good character, whose activities are good and who shows kindness of heart. {#blank#}3{#/blank#}

    {#blank#}4{#/blank#} If you tell a friend your secrets, he or she won't tell anyone else. Friends share each other's joys and sorrows. They help each other when they are in trouble and cheer each other up when they are sad. {#blank#}5{#/blank#} In conclusion, when you have made a good friend, don't forget him or her.

A. Knowing how valuable friendship is, we should be very careful in our choice of a friend.

B. It is very difficult to find a better definition of friendship.

C. A true friend can always be trusted, loved and respected.

D. The most important thing is that a friend always understands you.

E. We should avoid these shallow people who are easily changed by adversities or misfortune.