题目内容
In the past，man did not have to think about the protection of his environment.There were few people on the earth，and natural resources seemed to be unlimited.Today things are different.The world has become too crowded.We are using up our natural resources too quickly，and at the same time we are polluting our environment with dangerous chemicals.If we continue to do this，human life on the earth will not survive.
Everyone realizes today that if too many fish are taken from the sea，there will soon be none left.Yet，with modern fishing methods，more and more fish are caught.We know that if too many trees are cut down，forests will disappear and nothing will grow on the land.Yet，we continue to cut down more and more trees.We realize that if rivers are polluted with waste from factories，we will die.However，in most countries waste is still put into the rivers or the seas and there are few laws to stop this.We know，too，that if the population of the countries is rising at the present rate，in a few years，there will not be enough food.What can we do to solve these problems?
If we eat more vegetables and less meat，there will be more food for everyone.Land that is used to grow crops can feed five times more people than land where animals are kept.
Finally，if we educate people to think about the problems，we shall have a better and cleaner planet in the future.
1.Today we have to think about the protection of our environment because ________．
A. things on our planet are getting worse and worse
B. the limited natural resources are being used quickly
C. the environment is continuing to be polluted by too much waste and poison
D. worse environment is endangering the lives of human beings
2.Which of the following statements is NOT true?
A. If we eat more meat，more food can be saved.
B. In the past, there were few people who thought about the environment protection.
C. If we keep on cutting down trees，forests will disappear.
D. We should not take more and more fish out of the sea，or there will soon be no fish left.
3.According to the passage，the most important thing we must understand is that ________．
A. we should keep our environment from being polluted
B. we must make enough laws to protect our natural resources
C. man will destroy himself if he doesn't solve the problems
D. we will have enough food if the world population rises at the present rate
