Almost all our energy comes from oil, coal, and natural gas. We call them fossil fuels. The earth’s fossil fuels are running out. What will happen when there is no oil, coal and gas on the earth? Scientists are trying to find and use other alternative sources of energy. We can use energy from the sun, the wind, and the water. Solar energy is unlimited. The sun supplies all the energy used to grow plants, to evaporate water for the rain, and to maintain the temperature of the planet. All are necessary for human life. If we are able to collect solar energy, we will be sure to have this abundant source of power.
66.What are the other words or phrase for fossil fuels?
A. oil B. oil, gas, natural gas C. natural gas D. coal
67.Natural sources of energy are energy from .
A. the sun, wind, water B. water C. wind D. the sun
68.From which do plants on the earth get energy?
A. the moon B. the sun C. stars D. the Mars
69.We are asking the question, “What will happen when there is no oil, coal, and gas on the earth?” because .
A. we are looking for other alternative sources of energy B. we are looking forward to seeing great changes
C. we are now depending so much on oil, coal, and natural gas
D. other sources of energy can come from the sun, wind, and water
70.The word “abundant” in the passage is closest in meaning with .
A. natural B. necessary C. plentiful D. Limited
