Passage 2
Throughout history man has changed his physical environment in order to improve his way of life. With the tools of technology he has altered many physical features of the earth. He has transformed woodlands and prairies into farmland, and made lakes and reservoirs out of rivers for irrigation purposes or hydroelectric power. Man has also modified the face of the earth by draining marshes and cutting through mountains to build roads and railways.
However, man’s changes to the physical environment have not always had beneficial results. Today, pollution of the air and water is an increasing danger to the health of the planet. Each day thousands of tons of gases come out of the exhausts of motor vehicles, smoke from factories pollutes the air of industrialized areas and the surrounding areas of the countryside. The air in cities is becoming increasingly unhealthy.
The pollution of water is equally harmful. In the sea, pollutio
A. Transform woodland and prairies into farmland.
B. Make lakes and reservoirs out of rivers.
C. Cut down forests to build houses.
D. Cut through mountains to build roads.
Once a man and his wife worked for an old man. There was a big box in the old man’s living room. The old man pointed to the box and said, "There’s only one thing you (1) do. Don’t open the box. " (2) saying this, he left his home.The woman said to her husband," There must be (3) expensive in the box. Let’s open it, shall we" Her husband said (4) to her. But the woman didn’t give up her (5) . One day, she decided to find out (6) was in it. Her husband didn’t stop her. She opened the box and looked inside. To her surprise, she found nothing in the box. She tried hard to close it, but she (7) That evening the old man came home and found the box was (8) . He was very (9) and asked the woman and her husband to leave his home."But there was nothing in the box," the woman said. "We haven’t taken anything at all. "The old man (10) them, "The box is not important, but I cannot believe you. That’s
A. After
B. For
C. By
D. Before
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