Nowadays people are more aware that wildlife all over the world is in (31) _______. Many species of animals are threatened, and could (32) ________ become extinct if we do not make an effect to protect them. There are many reasons for this. In some cases, animals are hunted for their furor for other valuable parts of their bodies. Some birds, such as parrots are caught alive and sold as pets. For many animals and birds, the problem is that their (33) _______ - the place where they live - is disappearing. More land is used for farms, for houses or industry, and there are fewer open spaces than there once were. Farmers use (34) _______ chemicals to help them grow better crops, but these chemicals (35) _______ the environment and harm wildlife. The most successful animal on earth- human beings- will soon be the only ones left, unless we can solve this problem. 20. A. danger B. dangerous C. endanger D. dangerously 21. A. easy B. easily C. ease D. easier 22. A. habitant B. habitation C. habitat D. habitable 23. A. power B. powerless C. powerfully D. powerful 24. A. pollute B. pollution C. polluted D. pollutant GIÚP E VỚI MN ƠI