Read the following passage and mark the letter A, B, C, or D to indicate the correct word or phrase that best fits each of the numbered blanks.
Cheap and reliable electric lighting was a holy grail for 19th-century inventors. But didn't Thomas Edison get there first? No! He was beaten (11) ____ it by Britain's very own Joseph Swan, working out of his (12) ____ lab at his house in Gateshead, Swan got his (13) ____ - and started manufacturing and selling his bulbs - in 1880. He developed a tiny lament that used (14) ____ treated cotton, and set it inside an oxygen-free vacuum (15) ____ it wouldn't catch fire when it glowed white-hot.
Swan's first bulbs lasted little more than 12 hours but, unlike gas lamps, there was no name or dirty smoke and they soon (16) ____ on. The impresario Richard d'Oyly Carte (17) ____ the opportunity to make his new Savoy Theatre in London stand (18) ____ - and when it opened the following year it was the first public building in the world (19) ____ electrically throughout. D'Oyly Carte even took to the (20) ____ himself - holding a glowing bulb aloft, he ceremoniously broke it in front of the audience to prove it was safe.
Question 15.
soso thatthanrather thanHướng dẫn giải:Liên từ chỉ điều kiện, kết quả
Dịch: Ông đã phát triển một loại than thở nhỏ sử dụng bông được xử lý đặc biệt, và đặt nó trong một chân không không có oxy để nó không bắt lửa khi phát sáng nóng trắng.
