.. 49... 51... 53... 55... IV. ĐỌC KỸ ĐOẠN VĂN VÀ LÀM CÁC BÀI TẬP I...

47... 49... 51... 53... 55... IV. Đọc kỹ đoạn văn và làm các bài tập IV-A, IV-B, IV-C ở d ới. We are all destroying the Earth. The seas and rivers are too dirty to swim in. There is so much smoke in the air that it is unhealthy to live in many of the world’s cities. In one well-known city , for example, poisonous gases from cars pollute the air so much that policemen have to wear oxygen marks. We have cut down so many trees that there are now vast areas of waste land all over the world. As a result, farmers in parts of Africa can not grow enough to eat . In certain countries in Asia there is so little rice. Moreover, we do not take enough care of countryside. Wild animals are quickly disappearing. For instance, tigers are rare in India now because we have killed too many for them to survive. However, it isn’t so simple to talk about the problem. We must act now because it is too late to do anything about it. Join us now! Save the Eath. VI-A. Giải thích hoặc cho từ đồng nghĩa với các từ sau bằng tiếng Anh :( 1điểm)