CHỈ CÓ 3 CÂU THÔI Ạ NHANH I often hear or read about “natural disaster” – the eruption of Mount St Helen, avocano in the state of Washington, Hurricane Andrew in Florida, the floods in the American Midwest, terrible earthquakes all over the world, Huge fires, and soon. But I’ll never forget my first personal experience with the strangeness of nature – “The London killer fog” of 1952 . It began on Thursday, December 4th When a high – pressure system (warm air) covered southern England with the Freezing – Cold air below, heavy fog formed . Pollution from factories, cars and coal stones mixed with the fog the humidity was terribly high, there was no bneeze at all. Traffic (cars, trains and boats) stopped. People couldn’t see and some walked into the railroad tracks or into the river. It was hard to breathe and many people got sick. Finally on Tuesday, December 9th, the wind came and the fog went away . But after that, even more people got sick, many of them died. 18. What didn’t happen during the time – of the “London killer Fog” A. Pollution B. Humidity C. Heavy Rain D. Heavy Fog 19. What does the word “hard” is closest in meaning to…… A. good B. dirty C. difficult D. necessary 20. The underlined word “it” prefer to? A. the London killer Fog C. The floods in the American Midwest B. Hurricane Andrew in Florida D. Huge Fire