about twenty percent of the world's present energy comes from the sun in one form or another. Special devices have already been made available to put on the roofs of houses and flats to catch the sun's rays and thus heat water. Thousands of these devices are now being used to provide energy in homes throughout the United States while more than a million solar water-heating units have already been built in homes in Japan. Other purposes for which solar energy is at present, being used include the separation of salt from seawater, irrigation and sewage disposal. For most people in developing countries, the need is not air-conditioners or central heating, but for cheap ways of cooking food, drying crops, and lighting house.

1.what have people made to help houses and flats to catch the sun's rays?

2.where have people built more than a million solar water-heating untis?

3.is the solar energy being used to remove salt from seawater at present?

4.what do people in developing countries need?

they decided to go for a walk in the park.it was cold outside(although)

-->they

my mother was visiting an old builing.my father was going to a traditional craft viddage(while)

-->while

about twenty percent of the world's present energy comes from the sun in one form or another. Special devices have already been made available to put on the roofs of houses and flats to catch the sun's rays and thus heat water. Thousands of these devices are now being used to provide energy in homes throughout the United States while more than a million solar water-heating units have already been built in homes in Japan. Other purposes for which solar energy is at present, being used include the separation of salt from seawater, irrigation and sewage disposal. For most people in developing countries, the need is not air-conditioners or central heating, but for cheap ways of cooking food, drying crops, and lighting homes.

1.what have people made to help houses and flats to catch the sun's rays?

2.where have people built more than a million solar water-heating units?

3.is the solar energy being used to remove salt from seawater at present?

4.what do people in developing countries need?

Every year, thousands of people come to Edinburgh, the capital city of Scotland, to be part of the Edinburgh Festival. For three weeks every August and September the city is filled with actors and artists from all over the world. Thay come to Edinburgh for the biggest arts festival in Britain. During this time, the streets of the city are alive wwith music and dance from early in the morning until late at night. You can even see artists paining pictures on the streets!Tens of thousands of tourists come to the Festival to see new films and plays and to hear music played by famous musicians. This year, you can sê over five hundred performances wwith actors from more than forty countries.The tickets for these performances are quite cheap, and it usually easier to see your favourite star in Edinburgh than it is in London. So come to Edinburgh next summer.

Many people now think that teachers give students too much homework. They say that it is unnecessary for children to work at home in their free time.

Moreover, they argue that most teachers do not properly plan the homework tasks they give to students. The result is that students have to repeat tasks which they have already done at school.

Most people agree that homework is unfair. A student who can do his homework in a quiet and comfortable room is in a much better position than a student who does his homework in a small, noisy room with the television on. Some parents help their children with their homework. Other parents take no interest at all in their children’s homework.

It is important, however, that teachers talk to parents about homework. A teacher should suggest suitable tasks for parents to do with their children. Parents are often better at teaching their own children!

Environmental pollution is a term that refers to all the ways by which man pollutes his surroundings. Man dirties the air with gases and smoke, poisons the water with chemicals and other substances, and damages the soil with too many fertilizers and pesticides. Man also pollutes his surroundings in various other ways. For example, people ruin natural beauty by scattering junk and litter on the land and in the water. Environmental pollution is one of the most serious problems facing mankind today. Air, water and soil are necessary to the survival of all living things. Badly polluted air can cause illness, and even death. Polluted water kills fish and other marine life. Pollution of soil reduces the amount of land that is available for growing food. Environmental pollution also brings ugliness to man’s naturally beautiful world.

1.what makes the air polluted?

2.in what way do people poison the water?

3.how does man damage the soil?

4.in what way do people ruin natural beauty?

5.according to the text,what is one of the serious problems facing mankind today?

about twenty percent of the world's present energy comes from the sun in one form or another. Special devices have already been made available to put on the roofs of houses and flats to catch the sun's rays and thus heat water. Thousands of these devices are now being used to provide energy in homes throughout the United States while more than a million solar water-heating units have already been built in homes in Japan. Other purposes for which solar energy is at present, being used include the separation of salt from seawater, irrigation and sewage disposal. For most people in developing countries, the need is not air-conditioners or central heating, but for cheap ways of cooking food, drying crops, and lighting homes.

1.what have people made to help houses and flats to catch the sun's rays?

2.where have people built more than a million solar water-heating units?

3.is the solar energy being used to remove salt from seawater at present?

4.what do people in developing countries need?

Travel and tourism are very important to millions of people over the world. In every country you can find people that work in travel and tourism. Some countries need the money from tourism to help their people survive. It is necessary for these places that travel and tourism continue to expand and bring money to their regions. However, travel and tourism have negative aspects. Planes, buses, boats and other means of transportation that carry travelers and tourists cause pollution. Moreover, some people do things on a holiday they would never think of doing at home. For example, many travelers use a lot of water and electricity when they stay in hotels. They forget to turn off the lights or ever leave televisions and air conditioning units on when they leave the room. On top of that, it is often difficult or impossible for travelers to recycle items, so they end up leaving large amounts of waste behind. That’s why it is important for people to travel wisely and respect the places they visit.

1.why does some countries need the money from tourism?

2.how does tourism affect the environment?

3.what do many travelers use a lot when they stay in hotels?

4.do some tourists end up leaving large amounts of waste behinf?

5.what shouldn't you do to be environmentally friendly when you are a tourist?