40, The last person who leaves the room must turn off the lights.A. The last person left the room must turn off the lights. B. The last person leaving the room must turn off the lights.C. The last person to leave the room must turn off the lights. D. The last person leaves the room must turn off the lights.THE SECOND TERM TEST (2014 – 2015)ENGLISH 11
Read the passage and choose the best answer
The search for alternative sources of energy has led in various directions. Many communities are buring
garbage and other bioligical waste products to produce electricity. Converting waste products to gases or oil is
harness power with giant windmills. Geothermal power 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 other potential source of energy. Scientists are studying ways to convert the energy of ocean currents, tides,
and waves to electricity. Experiments are aloso underway to make use of temperature diffences in ocean water
to produce energy.
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