Сократите текст ! до 5 строк! people often say that st petersburg is the venice of the north. this is because it is a beautiful city with 90 waterways, 42 islands and 300 bridges. every summer from june until july something wonderful happens in st petersburg. it is a wonder of nature that russians call the white nights. visitors from all over the world travel to the city to see this. during the white nights the sun does not set completely and a silver glow fills the sky. this sight attracts tourists and locals who take to the streets to enjoy it and celebrate at night, crowds of people sing and dance by the neva river. they watch the bridges open as boats pass by and fireworks fill the sky. a visit to st petersburg during that time is a fantastic experience

People often say that st petersburg is the venice of the north. Every summer happens the wonder of nature, which people call "the White Nights". Visitors from all over the world come to the city to see this. They watch the bridges ipen as boats pass by and fireworks fill the sky. A visit to St Petersburg during that time is a fantastic experience!

Big cities suffer from smog from large factories. Cars with their engines have become the main source of pollution in industrial countries. The forests Africa, South America and Asia are cut down for the needs of industries in Europe and the USA. As a result some species of animals, birds, fish and plants have disappeared and keep disappearing. Rivers and lakes dry up. One of the most known examples is the Aral Sea, which has become much smaller due to men’s activity.

The pollution of the air and of the world’s oceans and the thinning of the ozone layer nowadays are the main problems arising from man’s careless attitude to ecology.

In Russia and the former Soviet republics there are some areas where the environment is in a poor state. The Aral Sea, Lake Baikal, the Kuzbass, Semipalatinsk and Chernobyl are such problematic regions.

For decades nuclear weapons were tested near Semipalatinsk, and the ground is contaminated with radiation there.

More than 20 years ago a pulp-and-paper factory was built on the shore of Lake Baikal. As a result of the pollution, more than 50 % of the world’s purest water has been ruined. The whole ecological system of the lake has change greatly.

1. The Jamaican team were excited about going to Austria because they HAVE never SEEN snow before. 
2. After the holiday, he was keen to see the photos that he HAD TAKEN. 
3. Anna CAME first in the school cross-country race last week. 
4. I missed the first goal because by the time I got to the stadium the game Had (already) STARTED. 
5. The first time I tired skiing, I found it quite easy because I DID a lot of waterskiing. 
6. After the accident, I phoned Andy's parents to say that he HAD HURT his arm. 
7. Manchester United WON the championship last year. 
8. My brother used to love scuba-diving, but he HAD never GONE swimming on his own.