[填空题]People who live in heavily industrialized areas do not get as much sunlight as they should. Dust (1) over a city at altitudes (海拔) of between 4,000 and 8,000 feet cuts out between 20 and 50 percent of the sunlight and up to 90 percent of the ultraviolet light (紫外线). But dust is not the only thing to (2) about. When fuels are burned, whether in a factory, or in a home, or in the engine of a car, CO₂ is given off. CO₂ in the atmosphere acts as a kind of (3) around the earth, keeping warms in and so slowly raising the (4) of the earth. This could really change the climate all over the world.
Everybody wants to have a car. (5) , while they are giving us so much pleasure, cars are also poisoning us. The amount of dangerous substances sent out by a car is quite (6) . Did you know, for example, that a hundred cars produce on (7) a third of a ton of CO₂ as well a

[填空题]People who live in heavily industrialized areas do not get as much sunlight as they should. Dust (1) over a city at altitudes (海拔) of between 4,000 and 8,000 feet cuts out between 20 and 50 percent of the sunlight and up to 90 percent of the ultraviolet light (紫外线). But dust is not the only thing to (2) about. When fuels are burned, whether in a factory, or in a home, or in the engine of a car, CO₂ is given off. CO₂ in the atmosphere acts as a kind of (3) around the earth, keeping warms in and so slowly raising the (4) of the earth. This could really change the climate all over the world.
Everybody wants to have a car. (5) , while they are giving us so much pleasure, cars are also poisoning us. The amount of dangerous substances sent out by a car is quite (6) . Did you know, for example, that a hundred cars produce on (7) a third of a ton of CO₂ as well a

[填空题]People in remote areas who live in miserable conditions have the most health problems.

[简答题]People who live in the areas________________(地震多发地区) should build houses that are resistant to ground movement.

[填空题]People who live in glass houses should not throw stones .

[简答题]

Today many people who live in large metropolitan areas such as Paris and New York leave the city m summer. They go to the mountains or to the seashores to escape the city noise and heat. Over 2.000 years ago, many rich Romans spent their summers in the city of Pompeii. Pompeii was a beautiful city. It was located on the ocean, on the Bay of Naples. In the year 79 A. D., a young Roman boy who later became a very famous Roman historian was visiting his uncle in Pompeii. The boy’s name was Pliny. One day Pliny was looking at the sky. He saw a frightening sight. It was a very large dark cloud, this black cloud rose high into the Sky. Rock and ash flew through the air. What Pliny saw was the eruption—the explosion—of the volcano. The city of Pompeii was at the foot of Mt. Vesuvius.
When the volcano first erupted, many people were able to flee the city and to escape death. In fact, 18,000 people escaped the terrible disaster. Unfortunately, there was not enoug