A) 6.4.7.1 Read the text and answer the questions.
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1 Why couldn't people build really tall buildings in the past?
2 When could people start building skyscrapers?
3 How did the invention of the elevator change the history of buildings?
4 Why did people want to build skyscrapers in cities?
5 Why are tall buildings called 'skyscrapers'?
6 How fast did the Empire State Building grow?
7 What can you find in the Triumph of Astana in Kazakhstan?
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