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 rain, and to maintain the temperate 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.

36. From which do plants on the earth get energy?

A. stars                                    B. the Mars                             C. the moon                            D. the sun

37. What are the other words or phrase for fossil fuels?       

A. natural gas                          B.  gas, natural gas oil            C. coal                                    D. oil,

38. Natural sources of energy are energy from________.

A. the sun, wind, water           B. the sun                                C. water                                  D. wind

39. The word “abundant” in the passage is closet in meaning with________.

A. plentiful                             B. limited                                C. natural                                D. necessary

40. We are asking the question, “What will happen when there is no oil, coal, and gas on the earth?” because________.

A. we are now depending so much on oil, coal, and natural gas      

B. other sources of energy can come from the sun, wind, and water

C. we are looking for other alternative sources of energy

D. we are looking forward to seeing great changes