4.1. Define what clause it is.
1. He is so happy that he wants to dance and sing!
a) purpose b) result c) reason d) manner
2. It looks as if Nicole doesn't want to talk to Bob any more.
a) purpose b) result c) reason d) manner
3. I will help you with your homework so that you can go to the dacha.
a) purpose b) result c) reason d) manner
4. She behaves as though she is the cleverest person in the world!
a) purpose b) result c) reason d) manner
5. Bill couldn't start the car due to the fact that it had been very cold at night.
a) purpose b) result c) reason d) manner
4.2. Choose the right answer (clauses of purpose)
1 They put us a sign to prevent people coming closer.
A for B from C to avoid D in case
2 Stephen has bought a computer he can work at home.
A so that B to avoid C for D in order to
3 I have come here talk to you.
A in case B to C for D so that
4 I will take a coat it is cold outside.
A for B in order to C from D in case
5 Barbara is keeping to a diet keep fit.
A so as to B from C for D to avoid

Firstly, it is a war. Due to the proliferation of nuclear weapons on the Earth, which are able to destroy a life on the planet, the problem of war and peace has become global.
Secondly, it is the global warming as well as the environmental pollution. Every day the climate of the planet is changing more and more, reserves of fresh water are depleted, the environment is being polluted. All this is the result of human's activities, and if we continue to do this, the death of humanity within a few generations is inevitable.
Poverty, famine and homelessness are the causes of death for many years. To date, the number of people suffering from hunger and malnutrition has reached 1 billion people. It creates a serious threat to the international security.
The last thing I would like to say is about endangered species of animals and plants. Their habitats are being destroyed. This is due to global warming, logging, fire, mining. To sum up, it is necessary to make conclusions about the global problems of extinction of organisms.

My favorite place isn't town. It is a small island on the Volga river. I go there with my family in summer. 
There are many Islands on the Volga river. Why is this Island my favorite place? Well, I like it because there are no people. It is very quiet and green. There are some sea-gulls there. What do we do there? We have picnics, play badminton, swim a lot. We go by boat early in the morning, and come late in the evening. We enjoy our picnic very much.

Мое любимое место это не город. Это небольшой остров на реке Волга. Я езжу туда с моей семьей летом.

На реке Волга есть много островов. Почему этот остров мое любимое место? Ну, мне нравится потому что здесь нет людей. Тут очень тихо и зелено. Здесь есть несколько чаек. Что мы делаем там? Мы устраиваем пикники, игрем в бадминтон, много плаваем. Мы едем на лодке рано утром и приезжаем поздно вечером. Мы очень наслаждаемся нашим пикником.