First, man came up with a simple _ to make their work easier. 2. So, the complex of _ _ _ _ _ _ _ turned into a _ . 3. In our days they are all around us. 4. They all do what is necessary for a human. 5. Examples of machines . 6. The machines consist of three main parts: , , and they. 7. If one of the parts is missing, the machine will not work . 8. The this is a system whose components are AR . 9. Summing up, _ _ engine This is a device for converting a single view from one movement to another. 10. are devices that perform useful work for man and turn one kind the other way.

I spent these winter holidays excellent. 2, 3 предложения правильно. The brightest day for me was, of course, the 31st of December. Since the morning there was the holiday atmosphere. The smell of tangerines mixed with the smell of spruce and it was the real smell of New Year. At midnight all members of my family were making a wish without telling it - according to the legend we should not say it, because it would not come true. Almost every day I spent with my friends. After a few days of New year, my sister came to us with her husband and daughter. Then the guests left and that meant the end of the holidays. Therefore I started to revise the passed material, learn poems and read new texts. В предпоследнем предложении нужно заменить "weather kept winter" на "the weather was wintery". I spent my free time with relatives, friends, visited interesting places and made my study better.

Пишу те предложения где есть ошибки:
Of course, the brightest day for me it was the 31st of December. The next day there was an atmosphere of a holiday iin the house.
the most authentic scent of the New Year came in...Under the strike of the clock each member of our family made a wish not pronounsing it aloud because. ...
Almost every day I met with my friends.
with her husband and a daughter.
Soon the guests left us and that meant that the holiday came to its end.
I began to repeat the past material. ..so that it would be easier.
In spite of that I had spent my holidays at home it was a great fun, it was really kept a winter weather .