Прочитайте текст Romans invaded Britain in AD 43 and chasing ancient Britons along Thames they came ...: ответ на тест 800612 - Английский язык

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Romans invaded Britain in AD 43 and, chasing ancient Britons along Thames, they came to first place where it was easy to cross. They built garrison there – and London was born. They also erected bridge over river. Garrison became major trading post. Later, bridge suffered neglect and whole area was raided by Vikings. In AD 886 Alfred Great drove out raiders, bridge was repaired and city prospered again. Hundred years later, Vikings returned but King Ethelred sailed up Thames, attached ropes to London Bridge, headed downriver and pulled it down.
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They built garrison there _______.

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Romans invaded Britain in AD 43 and, chasing ancient Britons along Thames, they came to first place where it was easy to cross. They built garrison there – and London was born. They also erected bridge over river. Garrison became major trading post. Later, bridge suffered neglect and whole area was raided by Vikings. In AD 886 Alfred Great drove out raiders, bridge was repaired and city prospered again. Hundred years later, Vikings returned but King Ethelred sailed up Thames, attached ropes to London Bridge, headed downriver and pulled it down.
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They built garrison there _______.

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We live in a detached house in the old part of the city. It has three floors and a basement, which I use as a study. It’s got a small front garden and a lovely view over the bay. Many people dream of buying a cottage in the country where they can escape to at weekends. Others even hope to own a villa in a beautiful location on the coast. Most people here, however, live in flats. There are a lot of students living here in rented rooms and bed-sits.
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It has three floors and a basement, _______.

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Mixing small wires with enlarged ends into concrete increases the material’s strength and hardness, according to research performed at the National laboratory, Los Alamos, New Mexico.
Researchers found that when bone-shaped wires 25 mm long were added in amounts equal to just 1 percent of the concrete’s volume, the strength increased by as much as 84 percent. The concrete was also 93 times harder.
Straight steel wires have been used to reinforce concrete for several decades. But wires of this kind bond only weakly with the concrete at their ends. Besides, it turned out that straight wires can also snap under high stress without much bending or stretching. In stress tests concrete containing the wires with bulbous ends became even stronger after the first cracks appeared as the load was transferred to the wires.
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Straight steel wires have been used _______.

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The plant where high-density polyethylene pipe is being manufactured needed repairs to its pipe storage area. The repairs became necessary because the stone layer did not shed water and it caused cracks. The cracking of storage pavement area made it necessary to stabilize the site.
So it became necessary for engineers to look for a way that would be economical and would not require shutting down the operating area of the plant. After testing a number of alternatives, it was decided to use polypropylene fibres for the purpose. It was found out that when being mixed with soil the fibres produce the necessary stability. The way the engineers proposed turned out to be economical and quite successful.
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It was found out that _______.

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The new concrete pipe being manufactured may be classified as the benchmark of industry. Among other excellent qualities, it possesses the highest structural strength compared with any sanitary sewer.
What are the main characteristics of the pipe that make it so popular? These are advanced concrete mix design, and steel reinforcement. High quality manufacture processes allow the pipe to be used in any site conditions, from shallow fills to deep bury situations. Strength, concrete’s pipe’s durability and its versatility are the main properties that are combined in the pipe. They produce the technology one can trust.
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Strength, concrete’s pipe’s durability and its versatility _______.