2. 3. 4. 5. PART B

1. 2. 3. 4. 5.

PART B: VOCABULARY

I.Fill the blank with the right word from the list. There are more words than needed.(5pt)

protect produce environmentally alternatives

power consumption abundant limited

Coal, oil, and natural gas supply modern civilization with most of its power. However, not only are

supplies of these fuels (1)____________, but they are a major source of pollution. If the energy demands

of the future are to be met without seriously harming the environment, existing alternative energy

sources must be improved or further explored and developed. These include nuclear, water, solar, wind,

and geothermal power, as well as energy from new, nonpolluting types of fuels. Each of these

(2)____________, however, has advantages and disadvantages.

Nuclear power plants efficiently (3)____________ large amounts of electricity without polluting the

atmosphere; however, they are costly to build and maintain, and they pose the daunt ing problem of what

to do with nuclear wastes. Hydroelectric power is inexpensive and (4) ________________ safe, but

impractical for communities located far from moving water. Harnessing energy from tides and waves has

similar drawbacks. Solar (5) ____________ holds great promise for the future but methods of collecting

and – concentrating sunlight are as yet inefficient, as are methods of harnessing wind power.