Перепишите следующие предложения. Выберите нужную форму глагола (Present, Past, Future Simple или Present, Past, Future Perfect).
1. The negotiators realized another meeting would be necessary be- cause they didn′t reach/hadn′t reached the agreement.
2. I lived/had lived in Germany for three years; then I came back to England.
3. Don′t worry about the order from Siemens. I already dealt/ have al- ready dealt with it.
4. I study/have studied English for five years.
5. The plane will take/have taken off at 6 in the evening.
6. By the end of January we will demolish/have demolished the oldbuilding.

Ideas...
In the last 300 hundred years people have made a mess on the Earth.They chopped trees, killed many animals, polluted air, water and soil, etc. And now we have a lot of ecological problems like the greenhouse effect, extinct and endangered animals and plants, water, air and soil pollution, holes in the ozone layer, problems of burying different kinds of waste and garbage, acid rains and others. Global warming is another problem that we face today. Global warming is the rise in the average temperature of Earth's atmosphere and oceans since the late 19th century and its still rising.

That was the best performance I had ever seen.  

I would like to tell about operetta “The Bat” (летучая мышь) composed by Johann Strauss. It is a charming story of love, flirt, humor, joy and intrigues. I saw this operetta in the theater of musical comedy last year. The operetta has three scenes. I highly advise it for everybody. It is a classical operetta, it is known all over the world. It was a colorful performance with great decoration, music, songs, dances. Also I need to say about great theatre staff, the play of artists was excellent, especially their costumes. I enjoyed all time. There were not vacant seats in the hall. To my mind, this operetta will be interesting for everybody.