Прочитайте текст и заполните пропуски подходящими по смыслу словами Man has always tried to improve ...: ответ на тест 284267 - Английский язык

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Man has always tried 1_______ his standard of living by changing his surroundings and by making tools to simplify the everyday tasks necessary for his existence. At first, the only 2_______ he could use were those he could see around him – stone, wood and so on. He survived in competition with other animals because of his abilities with his 3_______ and their coordination with his brain. Because he did not have 4_______ and speed of some animals, his survival depended on his skillful use to get food and to keep him warm and safe.

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Man has always tried 1_______ his standard of living by changing his surroundings and by making tools to simplify the everyday tasks necessary for his existence. At first, the only 2_______ he could use were those he could see around him – stone, wood and so on. He survived in competition with other animals because of his abilities with his 3_______ and their coordination with his brain. Because he did not have 4_______ and speed of some animals, his survival depended on his skillful use to get food and to keep him warm and safe.

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A variety of housing has been provided in new towns, including two-storey houses, bungalows, flats and maisonettes. The greatest demand is for 1_______ with gardens. Many families moving to the new towns have previously lived in overcrowded 2_______ in flats or rooms in the centres of cities and want the space and freedom of a house and a garden where children can play in safety. In view of this preference, care is taken to provide houses of varied 3_______ types, avoiding monotony and ensuring privacy. Houses may, for example, be built in courts, closes, terraces or other groupings and set various distances from, and angles to, roads. A number of 4_______ such as bricks and cements of different colours and panels of natural timber are also used.

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The first scientists to study colour was Sir Isaac Newton. He was an English 1_______      who lived from 1642 to 1727. Newton was the first person to 2 _______ white light into different colours.
In 1861 another English scientist, James Clerk Maxwell, showed that he could make other colours by mixing the primary colours – red, blue and yellow – in different ways. These other colours are called secondary and tertiary colours. We make secondary colours by 3 _______ two primary colours together. For example, red and yellow become orange, yellow and blue become green, and blue and red become violet. We make tertiary colour with one 4_______ colour.
We can make a room look bigger or smaller, hotter or colder by using colour. Green and blue are cold colours. They can also make a room look bigger. Red, orange and yellow are hot colours. They can make a room look smaller.

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There have been many different number 1 _______ in the world. A long time ago the Babylonians counted in 60s and today computers count in 2s – using only 1 and 0. We call this 2-number system the binary system. Most systems, however, count in 10s. This is because we have 10 fingers. We call this system the decimal system from ‘decem’, the Latin word for 10.
The Romans used letters like I, V, X and C to 2 _______ in 10s but these are not very easy to use. The numbers most people use today come from India. We think they were 3 _______ by the Hindu people there. In the Hindu system the place of each number is important. For example, 832 is a different number to 238 or 382. The Hindu system was also used by the Arabs, and we now call them Arabic numbers. In about the 12th century an Italian called Leonardo Fibonacci wrote a book about Arabic numbers, and people all over Europe began using these numbers.
We do not know who invented the decimal point, but we know that in 1585 a man called Simon Stevin wrote  a book about the decimal point. The book was called ‘The Tenth’. Before we knew about the decimal point, we had to use 4 _______ like Ѕ and system ѕ when we talked about numbers smaller than 1.

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The Great Wall of China is so large that the men who landed on the moon could see it. It is the largest 1 _______ in the world.
It begins at Shanhaikun on the Yellow Sea and ends at Chaiyukan in the Gobi Desert. It is almost three thousand kilometers long. It is not only a wall, it has many thousands of 2 _______.
The Chinese people started building walls as early as 600 BC to keep out their enemies. However, it was the first emperor of China, Ch’in Shih Hwang-ti, who started the great Wall in about 214 BC. We get the word ‘China’ from his name.
Chinese workers built some of the Great Wall while Ch’in Shih Hwang-ti was emperor, bur most of it was 3 _______ much later, between 202 BC and 220 AD, and between 581 AD and 618 AD. After this time, no more work was done on the wall for hundreds of years, and much of it became broken. Then in the 15th century, the first of the Ming emperors started 4 _______ another wall near the first one. It is this wall that thousands of tourists visit every year.