Read the passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions. I often hear or read about natural disasters - the eruption of mount St Helen, a volcano in the state of Washington; Hurricane Andrew in Florida; the floods in the American Midwest; terrible earthquakes all over the world; huge fires; and so on and so on. But Ill never forget my first personal experience with the strangeness of nature - the London Killer Fog of 1952. It began on Thursday, December 4, 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 stoves mixed with the fog. The humidity was terribly high, there was no breeze at all. Traffic (cars, trains, and boats) stopped. People couldnt see, and some walked onto the railroad tracks or into the river. It was hard to breathe, and many people got sick. Finally on Tuesday, December 9, the wind came and the fog went away. But after that, even more people got sick. Many of them died. 33. What is the passage mainly about? A. The London Killer Fog. B. Hurricane Andrew in Florida C. The floods in the American Midwest D. A volcano in the state of Washington. 34. Which natural disaster is NOT mentioned in the text? A. A volcano. B. A flood. C. A hurricane. D. A tornado. 35. What does the word It refer to? A. the eruption of mount St Helen B. the London Killer Fog of 1952 C. terrible earthquakes all over the world D. The UK 36. How long did the London Killer Fog last? A. For four days. B. For five days. C. For six days. D. For a week. 37. Which of the following is closest meaning to the word went away in the passage? A. disappeared B. appeared C. started. D. came.