Điền từ thích hợp bằng cách chọn đáp án A, B, C hoặc D để điền vào chỗ trống trong đoạn văn từ câu 51 đến câu 60.
A pioneer in the field of telecommunications, Alexander Graham Bell was (51) _________ in 1847 in Edinburgh, Scotland. He moved to Ontario, and then to the United States, setting in Boston, before beginning his career as an inventor. Throughout his life, Bell had been interested (52) _________ the education of deaf people. This interest led him to (53) _________ the microphone and; in 1876, his “electrical speech machine,” which we now call a (54) _________ New of his invention quickly (55) _________ throughout the country, even throughout Europe. By 1878, Bell had set up the first telephone exchange in New Haven, Connecticut. By 1884, lone distance connections were (56) _________ between Boston, Massachusetts and New York City.
Bell imagined great uses for his telephone, like the model from (57) _________ 1920s, but would he ever have (58) _________ telephone lines being used to transmit video images? Since his (59) _________ in 1922, the telecommunication industry has undergone an amazing revolution. Today, non hearing people are able to use a special display telephone to communicate. Bell's “electrical speech machine” paved the way (60) _________ the information Superhighway.
Trả lời câu hỏi dưới đây:
_________ (51)