1. The fruit was set out for sale.
2. The father set Robert to work.
3. Early in the morning we set off on our trip around the neighbourhood.
4. The children began to fix the broken bicycle as soon as it was brought.
5. The family set off to London. They took their golden things with them.
6. Have you set about collecting material on theatres and cinemas in Great Britain?
7. The fashionable dress was set out in the shop window.
8. Whom do you set to do this?
B 1. It was a cold winter night.
2. We set off on our journey on a spring morning.
3. It was real autumn. Leaves were falling from the trees, it was cool but dry.
4. Early spring and late spring are different. Early autumn and late autumn are different too.
5. The Second World War began in the spring of 1939.
6. In the rainy autumn many birds flew away to the south.
7. What are your plans for the summer?
8. In Europe classes at schools usually begin in autumn.
9. It was mid summer.
10. Yesterday night we watched the sun setting.
Everyone admits that the world is currently facing a number of serious environmental challenges.
One of its forms is air pollution. Any combustion produces smoke, soot and gases that can be harmful.
Air pollution also leads to acid rain.
Trees suffer from acid rain as much as aquatic plants and animals.
Many of the oldest and most beautiful buildings in the world are now in danger.
Water pollution is just as dangerous as air pollution.
People dump too much garbage into the seas, lakes and rivers.
The worst kind of sea pollution is an oil spill.
Discharge of industrial and domestic waste leads to soil pollution.
Some of this waste can be radioactive and cause nuclear contamination that is extremely dangerous to humans and animals.
Similar accidents have occurred in the UK, USA, Japan and Chernobyl, Ukraine.
But we must remember that radioactive waste remains radioactive and hazardous for thousands of years.
Another widely discussed issue is global warming.
Climate change can cause great harm to our planet and those who inhabit it.
The list of environmental problems also includes population growth, shortages of food and fresh water in some parts of the world, destruction of wildlife and many others.
It's time to learn to live in harmony with nature and save our planet.
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