1. What marks was you given...? 2. Who has he been met by? 3. How many games was played by the teams? 4. On birthday he is given a lot of presents. 5. The holiday meeting had been hold before the Victory Day. 6. The game was lost with the score three to two. Grow - grew - grown Become - became - become Know - knew - knowm Cry - cried - cried Begin - began - begun Find - found - found Understand - understood - understood Say - said - said Think - thought - thought Take - took - taken Invite - invited - invited Learn - learnt - learnt Leave - left - left Lose - lost - lost Teach - taught - taught Lie - lied - lied Kill - killed - killed
People have always polluted the environment. However, until recently, pollution was not a serious problem. People lived in sparsely populated agricultural areas, they were not polluting cars. With the development of crowded industrial cities where large amounts of waste are dumped on a small area, this problem became much more serious. Automobiles and other new inventions make pollution more and more intense. In the late 60-ies people began to feel alarmed at the danger of environmental pollution. Air, water and soil are necessary for existence of all living beings. However, polluted air can cause illness and even death. Polluted water kills fish and other marine animals. On contaminated soil can not be cultivated food crops. In addition, environmental pollution spoils the natural beauty of our planet. The problem of environmental pollution is as complicated as serious. Cars pollute the air, but give people the opportunity of movement. Factories pollute the air and water but they provide jobs for people and produce necessary goods. Fertilizers and pesticides are important for agriculture, but they can ruin soil. Thus, people would have to stop using many useful things if they wanted to end pollution immediately. Most people, of course, doesn't want that. However, pollution can be reduced gradually. Scientists and engineers can find ways to reduce harmful emissions from cars and factories. The government could issue laws that would make enterprises take measures to reduce pollution. Individuals and groups of people can work together to persuade enterprises to stop activities causing environmental pollution
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