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Khi đặt tay lên bàn phím để gõ chữ tay luôn đặt ở bàn phím nào A hàng phím cơ sở B hàng phím số C hàng phím trên D hàng phím dưới
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C. READING the following passage and choose the letter A, B, C, or D to indicate the correct word or phrase that best fits each of the numbered blanks. Most people think of computers as very modern inventions, products of our new tecnological age. But actually the idea for a computer was worked out over two centuries ago by a man (16)______ Charles Babbage. Babbage was born in 1791 and grew (17)______ to be a brilliant mathematician. He drew up plans for several calculating machines (18)______ he called “engine”. But despite the fact that he (19)______ building some of these, he never finished any of them. Over the years people have argued whether his machines would ever work. Recently, however, the Science Museum in London has finished building an engine based on one of Babbage’s designs. (20)______ has taken six years to complete and more than four thousand parts have been specially made. Whether it works or not, the machine will be on show at a special exhibition in the Science Museum to remind people of Babbage’s work

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