Задание

Read the text and choose the correct options

Our planet is 4,600 million years old. Let's think of it as a person who is forty-six years old. We don't know anything about the first seven years of this person's life. We also have very little information about the next thirty-five years. It was only at the age of forty-two that plants began to appear. Dinosaurs and great reptiles [ˈreptaɪlz] did not appear until one year ago, when the planet was forty-five. Mammals only arrived eight months ago. In the middle of last week apes became ape-like men and began to communicate with each other. Last weekend, the Ice Age covered the Earth.

Modern man has only lived on this planet for about four hours. During the last hour man began to work on land — grow plants and keep domestic animals. The Industrial Revolution and the rise of large cities began just sixty seconds ago.

During those sixty seconds of biological time, modern man has turned a lot of land into a rubbish dump. In one minute he has killed hundreds of species of animals. He has damaged the soil of his planet, cut down its forests. Now modern man stands looking at the damage he has done to the planet like a child stands looking at the toys he has broken. What step will he make next?

The age of planet Earth.

The positive results of people's activity.

The endangered species.

The period of time when there was no life on the Earth.

The period when life began to develop.

The solution to the ecological problems.

The negative results of people's activity.

The activity of man on the Earth.