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It can be inferred that integral in paragraph 1 is...

Câu hỏi: Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct answer for each of the questions from 30 to 34.
Automobiles have been around for a long time. We have grown up with them as an integral part of our lives. We use them every day and never really consider a time when automobiles did not exist. However, the automobiles as we know themtoday, werenot invented in a single day by a single inventor. The history of the automobile reflects an evolution that took place worldwide. It is estimated that over 100,000 patents created the modern automobile.
Automobiles have been powered by steam, electricity and internal combustion engines. The first steam automobile was built in 1769 by Nicolas Joseph Cugnot at the Paris Arsenal. The first electric car was built sometimes between 1832 and 1839 by Robert Anderson of Scotland. However, the internal combustion engine, powered by gasoline, became the standard over time.
By the early 1900s gasoline cars began to outsell all other types of automobiles. The market was growing for economical automobiles and the need for industrial production was pressing. The first car manufacturers in the world who built entire motor vehicles for sale-not just engine inventors who experimented with car design to test their engines- were French: Panhardand Levassor in 1889 and Peugeot in 1891.
Henry Ford is credited with creating the first economical car designed for the common man. His success was directly related to his creation of an assembly line. The assembly line reduced production costs for cars by reducing assembly time. Ford's famous Model T car was assembled in just ninety-three minutes.
It can be inferred that integral in paragraph 1 is closest in meaning to
A. Modern
B. Expensive
C. Enjoyable
D. Necessary
Câu trà lời này dựa vào thông tin "We have grown up with them as an integral part of our lives. We use them every day"
Đáp án D.
 

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