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完形填空
For thousands of years, people farmed the land. They grew
fruit and vegetables. They hunted and fished for meat. They1cloth, dyes (染料) and paper from
plants. They used stone and metal for weapons and tools.
People progressed to making machines powered2water and steam(蒸汽), and even later, by
coal, oil, and petrol. Large cities were built. Factories3of machines created jobs in the cities for
thousands of people. The Industrial Revolution(工业革命)
changed the lives of many people because, for the first time, more people lived
in cities rather than on4.
Companies built power plants (工厂) to make5to run the machines, factories and cities.
People did not realize these activities were6the Earth. They didn't realize how7oil, gas, coal and minerals were being
used up.8cities
grew bigger and spread across the land, plants and animals began to disappear. Their
nature homes were destroyed (破坏) as people moved into new places.
As time passed, people began to 9 the
need to protect the Earth and its natural resources(资源). People saw that
plants and animals needed protection so that they wouldn't disappear forever. People
joined together to tell10 around the world to conserve(节约) our natural resources and care for the Earth. And so, Earth Day
was born. Each year more and more people take part in Earth Day. What can you
do to help?
