The 20th century is a century of great achieve­ments in all fields. But at present there are many problems that must be solved. One of them is pro­tection of the environment. Many countries all over the world face this problem.

When Scrooge awoke, it was still very foggy and extremely cold, and there was no noise of people in the streets.Marley’s ghost bothered him. He didn’t know whether it was a dream or not. Then he remembered that a spirit should visit him at one o’clock. So Scrooge decided to lie awake and wait what happens.

Linguistic signals first said to be composed of some units which are divided into significant and non - significant ones. The relationship between all the units or elements of a language includes different notions starting from sounds, morphemes, words word combinations and ending up with phrases. The scientific study of a language involves an explanation of a mass of notions in terms of a rigorously organized and highly patterned system - the link between the units. 

Scrooge woke up in the middle of a snore, just before the clock struck one again. He sat up in his bed and waited for the second ghost to come. And there it was – the Ghost of Christmas Present. It had curly brown hair, sparkling eyes and it wore a simple green robe with white fur. Its feet were bare and on its head it wore a holly wreath.

Yes! And the bedpost was his  own. The bed was his  own, the room was his own. Best and happiest of all, the time before him was his own, and he could make the best of it.

Marley was dead, to begin with – there’s no doubt about that. He was as dead as a doornail. Marley and Scrooge were business partners once. But then Marley died and now their firm belonged to Scrooge, who was a stingy and heartless old man. Once upon a time, on Christmas Eve, old Scrooge sat busy in his office. It was very cold outside and in Scrooge’s office it was not much warmer either. Suddenly, a cheerful person entered the office. It was Scrooge’s nephew.

Slowly and silently the ghost came nearer. It was very tall and wore a deep black piece of clothing, which covered its whole body and left nothing of it visible but one outstretched hand.

Students often find themselves puzzled by Shakespeare's language and his inventive use of words. In fact, his contemporaries may well have had similar problems.

A major factor separating Middle English from Modern English is known as the Great Vowel Shift, a radical change in pronunciation during the 15th, 16th and 17th Century, as a result of which long vowel sounds began to be made higher and further forward in the mouth (short vowel sounds were largely unchanged). In fact, the shift probably started very gradually some centuries before 1400, and continued long after 1700 (some subtle changes arguably continue even to this day). 

Agrophysics is a new branch of science bordering on physics and agronomy, whose objects of study are the ecosystem and the biological objects affected by human activity, studied and described using the methods of physical sciences.