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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 all over the world; huge fires; and so on and so on. 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 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 terrible high, there was no breeze at all. Traffic (cars, trains, and boats) stopped. People couldn’t 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.

Which “natural disaster” isn’t mentioned in the text?

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Many years ago, people used to buy what they needed from stores and markets. Now where would you go if you wanted to buy all these goods at one time? Ask anybody, and he would probably say "you'd better go to the supermarket". A supermarket is a special kind of market. It is usually much larger than an ordinary store. In a supermarket, you can buy all kinds of food, household, products and daily necessities. In a store, a customer is served by a storekeeper but in a supermarket, the goods are arranged on rows of shelves along the aisles. The prices are printed on small labels on the goods. A customer gets goods he needs from the shelves. This is known as self-service. Of course, you can always ask for help from the supermarket shop assistants.

When you enter a supermarket, you take a basket to carry the goods you will buy. If you want to buy a lot of things, you will need a trolley. A trolley is like a large basket on wheels. You can push it along the aisles, choose what you want from the shelves and put it into your trolley. A supermarket often provides a more comfortable environment for shopping than a market that is usually wet and dirty. As a result, many people usually buy more goods than they need when they visit a supermarket.

Many years ago, people used to buy what they need from supermarkets.

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What is his unforgettable personal experience?

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How long did the “London Killer Fog” last?

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What didn’t happen during the time of “London Killer Fog”?

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Why did the traffic stop?

Read the passage and check True or False.

It is comfortable and convenient to shop at a supermarket.