People have keptcats as pets for thousands of years. Cats aregood example of how___animal can help___people, by catchingrats andmice,for example. This is probably___most important reason ancient people had___cats.These days,many people have a cat at home,but they only keep it forpleasure.Sometimes the cat sits on owner's chair or knee, and the owner getspleasant feeling when that happens.

1. The news about the school trip was exciting that the class could hardly concentrate on the textbook.
2. I was extremely worrying about my exam results and even refused to go on a trip untilni learned how i had done.
3. We have never been bored in our history class as our teacher is exceptionaly good.
4. The walk to the top of the mountain was quite tiring , but at the top we were rewarded with amazing views of the countryside around us.
5. The chance to study in Switzerland was really exciting , so Dina was surprised that nobody in her class could be bothered to apply for the scholarship.
6.Lena was complitely exhausted after the 800m race, but her time was encouraging and it was satisfying to know that even her coach was pleased.
7. It is disturbing, and it makes me personally quite depressed, how many teenagers seem to be only interested in computer games and other activities wich are mentally challenging and quite mindless in fact.

киты – животные теплокровные сохранять постоянство температуры тела независимо от окружающей среды. Внушительная жировая прослойка защищает животных от переохлаждения и поддерживает постоянную температуру тела около 35-40 градусов.

Киты дышат не жабрами, а легкими. У кита отсутствуют жабры, зато есть мощные легкие с отлично сформированной мускулатурой, благодаря чему киты на 90% осуществляют воздухообмен за один вдох/выдох (для сравнения: у человека воздухообмен происходит лишь на 15%). Поэтому киты, в зависимости от вида пребывать в толще воды от 10 до 40 минут, а кашалоту глотка воздуха хватает на 1,5 часа.

There are over two thousand animal spices in the world, but only two or three dozens of them are domesticated. All the rest live in the wild nature, and are not domesticable. They are usually referred to wild animals. Wild animals are distinguished from the domestic ones by external appearance, behavior and feeding habits. But the key difference between them is their attitude to humans. Wild animals always see people as enemies rather than friends. Their fear for humans is genetic, and even if you manage to tame one of them, its joeys will not be born tamed.

To my mind, the most unusual wild animals live in Australia. It is, for example, the kangaroo – the most well-know marsupial mammal, which breeds the young in the pouch. It is also a koala bear – a sluggish wooly animal which is often called the symbol of Australia. Finally, Australia is home for the emu, the second largest flightless bird in the world.