21. Part 2: Vocabulary Cloze
Some years ago, when I was working as an astronomer at the Greenwich Observatory in London, I received a letter from an elderly lady living nearby who said: 'When I was a girl, we could see so many stars, but they're not there any more. Have they faded?' Walking down the hill on which the observatory stands, I (1) _____ the truth of what she said. (2) _____ me were all the lights of London and above me was the orange glow they (3) _____ up into the night sky. But I could (4) _____ see any stars.
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25.
If light pollution - as this effect is known - continues to increase at its present (5) _____, our grandchildren will only
(6) _____ the chance to see the stars if they visit an observatory (7) _____ the one in Greenwich. Light pollution is almost (8) _____ for granted in most cities, and it is fast spreading into rural areas too. (9) _____ recent research, almost half of all Europeans and two-thirds of North Americans can no longer see the Milky Way. And this type of pollution doesn't only (10) _____ our view of the night sky.
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31.
It is difficult to imagine a world without tomatoes. High in the Andes mountains of modern-day Peru, the local inhabitants have been cultivating and eating tomatoes since prehistoric (11) _____, but the food has only become
(12) _____ in the rest of the world (13) _____ recently. These days, the bright red fruit (14) _____ an important role in the cooking of many cultures and is a key ingredient in many types of fast food, providing both taste and colour to dishes that (15) ____ would be rather ordinary.
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36.
The tomato (16) _____ to the nightshade family of plants, many members of which are poisonous. When they were first (17) _____ into North America, therefore, tomatoes were viewed with (18) _____ and people tended to use them as table decorations (19) _____ than as food. In Europe, the tomato was first grown in Italy in 1555, although it wasn't combined with pasta until much later. The first recipe for tomato ketchup dates from 1727 and in the 1800s, tomatoes began to be used more (20) _____ in sauces and soups..
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121. Part 5: Word Building