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You should spend about 20 minutes on this task. The two graphs show the main sources of energy in the USA in the 1980s and the 1990s.Write a report for a university lecturer describing the changes which occurred. Write at least 150 words. model answer: The two graphs show that oil was the major energy source in the USA in both 1980 and 1990 and that coal, natural gas and hydroelectric power remained in much the same proportions. On the other hand, there was a dramatic rise in nuclear power, which doubled its percentage over the ten years. Oil supplied the largest percentage of energy, although the percentage decreased from 42% in 1980 to 33% in 1990. Coal in 1990 was the second largest source of energy, increasing its proportion to 27% from 22% in the previous decade. Natural gas, the second largest source in 1980 at 26%, decreased its share very slightly to provide 25% of America’s energy ten years later. There was no change in the percentage supplied by hydroelectric power which remained at 5% of the total energy used. Nuclear power the greatest change: in 1990 it was 10%, twice that of the 1980s. You should spend about 20 minutes on this task. The graph below shows the differences in wheat exports over three different areas.Write a report for a university lecturer describing the information shown below. Write at least 150 words. model answer: The three graphs of wheat exports each show a quite different pattern between 1985 and 1990. Exports from Australia declined over the five-year period, while the Canadian market fluctuated considerably, and the European Community showed an increase.In 1985, Australia exported about 15 millions of tonnes of wheat and the following year the number increased by one million tonnes to 16 million. After that, however, there was a gradual decline until 1989 and 1990 when it stabilised at about 11 million tonnes. Over the same period, the amount of Canadian exports varied greatly. It started at 19 million tonnes in 1