Выберите варианты перевода глагола происходить: ответ на тест 57218 - Английский язык

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The Egyptian pyramids are huge structures which are almost 4,600 years old. The Pyramid of Cheops consists of 2,300,000 stones. Each of the stones weighs 2.5 tones.
According to the usual explanation large blocks of stone were cut in the mountains and then transported with the help of the most primitive equipment. So about 100 thousand people had to take part in the construction.
But the modern experiments show that the stones of pyramids were made synthetically. The Egyptians produced some special solution. Later they mixed it with one of the minerals. It took them several hours to transform this mixture into very hard rock. This rock was produced just on the construction sites and so there was no need of transporting heavy stones.
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How much does each of the stones weigh?

Benjamin Franklin is acknowledged to be the founder of the theory of atmospheric electricity. He was the first to prove that the lighting was an electrical phenomenon. Franklin developed a new theory of electricity that he called positive and negative. He finally invented a means of protection against the disastrous effects of lighting – the lighting rod. Franklin is known and respected all over the world not only as a scientist but also as a citizen who did as much as he could for the good of his country. Coming out in defence of the Afro-Americans, Franklin declared slavery to be not only an evil from the moral point of view, but also an obstacle to the social interests of America. He is thought to be one of the broadest as well as one of the most creative minds of his time.
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Colloids exist in nature in the cells of plants and animals, in the sap of certain plants, among which is the rubber tree, and in the class of foods are called proteins. Colloids have recently come to be of tremendous importance in certain manufacturing processes, including the making of glass, rubber and artificial silk, tanning leather and dyeing.
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The story of the 1_______ of electricity is connected with the name of Thales, the Greek philosopher. The story goes that one day Thales rubbed a piece of amber against his sleeve and found to his great surprise that it 2_______ small bits of dried leaves. After further experimenting he concluded that this attractive 3_______ was a property that amber alone possessed. He called this characteristic “electricity” because the Greek word for amber was 4_______.