Read the passage and choose the best answer:

Hello students. Today I'd like to tell you some information about types and sources of energy. Energy is classified into two main groups: renewable and non-renewable.The energy generated from natural sources such as the sun, wind, rain, and tides is called renewable energy. They are plentiful and can be generated again and again. They also have low carbon emissions, so they are considered green and environment-friendly. Moreover, using renewable energy can reduce your electricity bills. Unfortunately, solar energy can be only used during the daytime but not during night or the rainy season. Geothermal energy also can bring toxic chemicals beneath the earth's surface to the top and can create environmental changes.

Non-renewable energy is the energy taken from other sources that are available on the earth. They are limited and will run out in the future. They can't be re-generated in a short time. Fossil fuels - natural gas, oil and coal - are examples. They are cheap and easy to use. However, when burnt, they release toxic gases in the air, so they cause serious environmental changes such as global warming. And the important thing is that non-renewable sources will expire someday.

71. How many main groups of energy sources are there?                                              71…

A. 2                      B. 3                      C. 4                      D. 5

72. What is NOT mentioned as a source of renewable energy?                                     72…

A. solar                B. wind                C. coal                           D. tides

73. What is TRUE about renewable energy sources?                                           73…

A. having high carbon emissions                B. plentiful and can be generated again

C. environment-unfriendly                         D. always available

74.What are the features of non-renewable energy?                                                      74…

A. unlimited and run out in the future        B. can be re-generated in a short time

C. expensive but easy to use                      D. limited and run out in the future

75. What is not an example of non-renewable energy sources?                                     75…

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