Read the text and fill in the gaps transforming the capitalized words. 1) DISCOVER 2) INDUSTRY 3) WEIGH 4) POSSIBLE 5) BUILD 6) BUILD 7) CONSTRUCT 8) USE 9) ELEVATE Two (1) ________ in the middle of the 1800s made it possible to build modern skyscrapers. Before the (2) ________ Revolution brick and stone walls carried the (3) ________ of buildings. Because each floor was very heavy, it was (4) ________ to build very high houses. In the middle of the 19th century steel became an important (5) ________ material. This metal was strong and light. Architects could now construct a steel skeleton to support very tall (6) ________. Chicago's Home Insurance Company Building was ten-stories tall and the first skyscraper to use such a steel (7) ________. Skyscrapers would have been (8) ________ if people had to walk up and down many flights of stairs. In 1853 an (9) ________ safe enough to carry passengers was invented.

Вот заполненный текст с преобразованными словами: Two discoveries in the middle of the 1800s made it possible to build modern skyscrapers. Before the industrial Revolution brick and stone walls carried the weight of buildings. Because each floor was very heavy, it was impossible to build very high houses. In the middle of the 19th century steel became an important building material. This metal was strong and light. Architects could now construct a steel skeleton to support very tall buildings. Chicago's Home Insurance Company Building was ten-stories tall and the first skyscraper to use such a steel construction. Skyscrapers would have been useless if people had to walk up and down many flights of stairs. In 1853 an elevator safe enough to carry passengers was invented. Разберём каждое слово и причину его изменения: 1. DISCOVER -> discoveries: Во множественном числе, так как речь идет о двух открытиях. 2. INDUSTRY -> industrial: Прилагательное, описывающее революцию. 3. WEIGH -> weight: Существительное, обозначающее вес. 4. POSSIBLE -> impossible: С отрицанием, так как было невозможно строить высокие дома из-за тяжести материалов. 5. BUILD -> building: Герундий (материал для строительства). 6. BUILD -> buildings: Множественное число, так как речь идет о зданиях. 7. CONSTRUCT -> construction: Существительное, обозначающее процесс строительства. 8. USE -> useless: С отрицанием, так как без лифта небоскребы были бы бесполезны. 9. ELEVATE -> elevator: Существительное, обозначающее лифт.