HE WAS VERY TIRED,……….HE TOOK A REST BEFORE CONTINUING THE WORK.A.A...

25.He was very tired,……….he took a rest before continuing the work.A.and B. but C. if D. soIII. Đọc kỹ đoạn văn sau rồi chọn phương án (A,B,C hoặc D) để hoàn thành cáccâu từ 26 đến 30.Air pollution happens when wastes dirty the air. People reduce most of the wastes thatcause air pollution. Such wastes can be in the form of gases or particles of solid or liquidmatter. These substances result chiefly from burning fuel to power motor vehicles and toheating buildings. Industrial processes and the burning of garbage also contribute to airpollution. Besides, there are other substances that naturally exist in the air. They include dust,pollen, soil particles, and naturally occurring gases.The rapid growth of population and industry and the increasing use of automobiles andairplanes have made air pollutionn a serious problem. The air we breathe has become so filledwith pollutants that can cause health problems. It also harms plants, animals, buildingmaterials, and fabrics.