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Which of the following is the main message from the sentence "sidewalks and sycamores are

A. Sidewalks and pedestrians are both important factors in city planning.
Besides sidewalks, trees are also an important part of good environment.
C. It is of no use asking people which is more important, sidewalks or sycamores.
D. Sidewalks and sycamores should both give way to planting trees in city.

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The old couple decided to move out of town to a quiet suburb, ______they had spent several

A. which
B. that
C. where
D. when

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1970 was "World Conservation (保护) Year". The United Nations wanted everyone to know that the world is in danger. They hoped that governments would act quickly in order to conserve nature. Here is one example of the problem. At one time there were 1,300 different plants, trees and flowers in Holland, but now only 860 remain. The others have been destroyed by modem man and his technology. We are changing the earth, the air and water, and everything that grows and lives. We can't live without these things. If it continues like this, we shall destroy ourselves.
What will happen in the future？ Perhaps it is more important to ask "What must we do now？" The people who will be living in the world of tomorrow are the young of today. A lot of them know that conservation is necessary. Many are helping to save our world. They plant trees, build bridges across rivers in forests, and so on. In a small town in the United States a large group of girls cleaned the banks of eleven kilometers of their river. Young people may hear about conservation through a record called NO ONE'S GOING CHANGE OUR WORLD. It was made by the Scatles, Cliff Richard and other singers. The money from it will help to conserve wild animals.
What the purpose of the United Nations' making 1970 the "World Conservation Year"？

A. They wanted to promote the awareness of people that the world is in danger.
B. They wanted to protect the environment in this year.
C. They hoped to change the environment.
D. They required people to plant trees.

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Which of the following is NOT mentioned as a cause for urban deforestation？

A. Insect pests.
B. Real estate development.
C. Lack of fund.
D. Government reshuffling.

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A．She thinks the weather will change.B．She always carries one when going out.C．She is c

A. She thinks the weather will change.
B. She always carries one when going out.
C. She is carrying it in case of rain.
D. She wants to protect her skin.

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