Bài tập cloze test - Đề 19

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In 1871, Bell started working on the harmonic telegraph — a device (1) allowed multiple messages to be transmitted over a wire at the same time. While trying to perfect this technology, which was backed by a group of investors, Bell became preoccupied with finding a way to transmit human voice over wires. (2) 1875, Bell, with the help of his partner Thomas Watson, had (3) up with a simple receiver that could turn electricity into sound. Other scientists, including Antonio Meucci and Elisha Gray, were (4) on similar technologies, and there’s some debate over who should be credited with the invention of the telephone. It’s said that Bell raced to the patent office to be the first to secure the rights to the discovery. On March 7, 1876, Bell (5) granted his telephone patent. A few days (6) , he made the first-ever telephone call (7) Watson, allegedly uttering the now-famous phrase, “Mr. Watson, come here. I want you.” By 1877, the Bell Telephone Company, which today (8) known as AT&T, was created. In 1915, Bell made the first transcontinental phone call to Watson from New York City to San Francisco.