Choose the word whose underlined part pronounced is differently from that of the rest. 1. A. compete B. sport C. effort D. introduce 2. A. sun B. solar C. safe D. sure 3. A. heat B. great C. release D. reach 4. A. polluted B. consume C. nuclear D. fuel 5. A. exhaust B. source C. enormous D. cause II. Choose the option that best complete the sentence or substitute for the underlined part. 6. My father, as well as his friends, _ going to the stadium for a special football match this afternoon | The search for alternative sources of energy has led in various directions. Many communities are burning garbage and other biological waste products to produce electricity. Converting waste products to gases or oil is also an efficient way to dispose of wastes. Experiment work is being done to derive synthetic fuels from coal, oil shale, and coal tars. But to date, that process has proven expensive. Other experimental are underway to harness power with giant windmills. Geothermal power, heat from the earth, is also being tested. Some experts expect utility companies to revive hydroelectric power derived from streams and rivers. Fifty years ago hydroelectric power provided one third of the electricity used in the United States, but today it supplies only 4 percent. The oceans are another potential source of energy. Scientists are studying ways to convert the energy of ocean, tides, and waves to electricity. Experiments are also underway to make use of temperature differences in ocean water to produce energy.
