The search for alternative sources

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 waste.
Experimental work is being done to derive synthetic fuels from coal, oil shale and coal tars. But to date, the process has proven expensive. Other experiments are underway to harness power with giant windmills. Geothermal power, heart form earth, is also being tested.
Some experts expect utility companies to revive hydroelectric power derived form streams and rivers. Fifty years ago hydroelectric power 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 to 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 produce energy.
1. Which is the best title of the passage?
A. The Use of Water Productions for Energy.
B. The Search for Alternative Sources of Energy.
C. Efficient Ways of Disposing of Waste.
D. New Discoveries in Geothermal Power.
2. Fifty years ago one third of the electricity in the United States was provided by…..
A. wind B. waste products C. water D. oil
3. In the second paragraph, the phrase “synthetic fuels” could best be replaced by which of the following?
A. Biological fuels B. Low burning fuels C. Fast burning fuels D. Artificial made fuels
4. Which of the following is NOT mentioned in the passage as an alternative source of energy?
A. Electricity B. Geothermal power C. Synthetic Fuels D. Burning of garbage
5. According to the author, the impracticality of using coal, oil shale and coal tars as sources of energy is due to…….
A. their being time consuming B. their being money consuming
C. the scarcity of sources D. the lack of technology