1) According to the text, students study better if A) they have a motivation.
B) they prepare for the exams.
C) their teachers are strict.
D) they have lots of homework to do. do extra homework? -

A. S. Pushkin is the greatest Russian poet. But I hope no one is challenging the view that he occupies an outstanding place in Russian literature and culture.

Every summer in June, thousands of people visit the Pskov land. They come here to the village of Mikhailovskoye to the wonderful festival of poetry, to see the places where he lived and worked.

Pushkin is always alive for us, he is the man we all know and love, the greatest of poets. Generations come and go, but Pushkin still remains. We are all grateful to Pushkin for each line of his works. Pushkin is not only a great poet for us. He is the perfect man combining brilliant talent with civil courage. His name is associated with our love for the Motherland, and the best in our life.

Hundreds of new concepts, hundreds of new words have appeared in the language in the years that have passed since his death, but not a single word of his poetry has become obsolete. Everything written by Pushkin continues to live. It has not become something of the past, it does not need any corrections and hardly needs commentary. His feelings and his views still correspond to our own feelings and views.

We admire the great world of Pushkin's poetry as a whole, each of us finding some special lines for ourselves, lines showing his sympathy and respect for his people. The reader cannot imagine his inner world without him.

Environment - a set of components of the environment, natural and man-made natural objects and man-made objects.
Components of the environment - land, minerals, soils, surface and ground water, air, flora, fauna and other organisms, as well as the ozone layer of the atmosphere and near-Earth space, providing a set of favorable conditions for the existence of life on Earth.
Pollution - into the environment of matter and (or) energy, property, location or number of which have a negative impact on the environment.
Contaminant - a substance or mixture of substances, the number and (or) concentrations exceed established for chemical substances, including radioactive and other substances and microorganisms standards and have a negative impact on the environment.
Air pollution - a really serious problem. Air is composed of oxygen, nitrogen, water vapor, and, thanks to our civilization, of a variety of toxic particles. The more of these particles in the air is, the less room is left in the atmosphere for oxygen.
   The problem of air pollution is not limited to the space outside. The air inside our homes and offices can be as dangerous to your health. The main source of pollution - cigarette smoke, but it is not the only one. Toxins are allocated even when you just cook. Every time you scratch the Teflon non-stick coating is allocated enough toxins to kill a canary.
 Greenhouse effect, which we all have been associated with the phenomenon of global warming, caused by toxic gases. The main enemy of clear atmosphere - methane. It is released from the decomposition of sewage.
Greatly affects our waterways. In every neighborhood, in every city there drain sewer, storm water from the highways and municipal enterprises directly into the river. Everything goes into the water, passing minor cleaning steps.