Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct answer to lớn each of the questions.
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The search for alternative sources of energy has led in various directions. Many communities are burning garbage & other biological waste products to produce electricity. Converting waste products to lớn gases or oil is also an efficient way to dispose of waste.
Experimental work is being done khổng lồ derive synthetic fuels from coal, oil shale & coal tars. But to date, that process has proven expensive. Other experiments are underway to lớn harness - power nguồn with giant windmills. Geothermal power, heat from the earth, is also being tested.
Some experts expect utility companies lớn revive hydroelectric power derived from streams and rivers. Fifty years ago hydroelectric nguồn provided one third of the electricity used in the United States, but today it supplies only four percent. The oceans are another potential source of energy. Scientists are studying ways lớn convert the energy of ocean currents, tides, and waves to electricity. Experiments are also underway to make use of the temperature differences in ocean water to lớn produce energy.
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A. Efficient Ways of Disposing of Waste
B. The Use of Water Productions for Energy
C. The search for Alternative Sources of Energy
D. New Discoveries in Geothermal power nguồn
Câu 2. In the second paragraph, the phrase “synthetic fuels” could best be replaced by which of the following?
Câu 4. According lớn the author, the impracticability of using coal, oil shale và coal tars as sources of energy is due khổng lồ ___________ .
A. their being time consuming
B. their being money consuming
C. the scarcity of sources
D. the lack of giải pháp công nghệ their being money consuming
A. Hydroelectric power nguồn will be the main source of energy
B. Synthetic fuels will be the principal source of alternative energy
C. Alternative energy will come from a variety of sources
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All alterenative production of energy will be delivered from water.
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