MOBILELIBRARIES, IN CARS, VANS OR TRUCKS, BRING BOOKS TO CHILDREN I...

23.

Mobilelibraries, in cars, vans or trucks, bring books to children in many small communities.

A.

Moving from place to place

B.

Being sent easily and quickly

C.

Staying in one place

D.

Changing shapes or expression easily and frequentlyRead the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correctword(s) for each of the blanks..The search for (24) sources of energy has led in various directions. Many communities areburning garbage and other biological waste products to produce electricity. (25) waste products togases or oil is also an efficient way to dispose of waste.Experimental work is being done to derive syntheticfuels from coal, oil shale and coal tars. But (26) date, the process has proven expensive. Otherexperiments are underway to harness power with giant windmills. Geothermal power, heart form earth, isalsobeing tested.Some experts expect utility companies to revive hydroelectric power derived form streams andrivers. Fifty years ago hydroelectric power provided one third of the electricity used in the United States, buttoday it supplies only four percent. The oceans are (27) potential source of energy. Scientists arestudying ways to convert the energy of ocean currents, tides and waves to electricity. Experiments are alsounderway to make (28) of the temperature differences in ocean water to produce energy.