I. Give correct form of the following words (5pts)

 1. You should spend your money and energy as_______ as possible. (economy)

 2. You can buy a lot of waste _____ made from this factory. (produce)

 3. This library is open to all ______  . (read)

 4. Air and water are _____  in our life. (necessary)

 5. My brother can repair electric______ very well. (apply)

 6. These _____ will conserve the earth. (innovate)

 7. Since the world’s energy resources are limited, we must _____them. (conservation)

 8. We suggest ______ the light bulb. It is broken. (replacement)

 II . Select the correct answer to complete the sentence . ( 5 points )

 1. Oh dear ! How ____________our household bills are ! We can’t pay them.

A. heavy               B. enormous                             C. small                 D. low

 2. In winter, heating ____________for 50 percent of our electricity bill.

 A. takes                 B. occupies                     C. accounts           D. costs

 3. Energy can be collected by solar ___________on cloudy days.

 A. boards              B. panels                         C. bars                  D. sheets

 4. If we don’t find __________ sources of power, we will use up all the fossil fuels in the near future.

 A. effective            B. efficient                     C. natural              D. alternative

 5. We want to use solar energy, ___________it cannot be used on cloudy days.

 A. but                             B. so                                C. because             D. however

 6. Are wind power ______________ solar power new kinds of energy for future use?

 A. and                   B. or                                C. with                  D. but

7. He is always broke. He can afford neither luxuries ____________ basic necessities.

 A. or                      B. nor                                       C. and                   D. but

8. Her husband bought not only two energy-saving light bulbs but ____________one cheap washing machine last Sunday.

 A. also                  B. too                                        C. as well              D. some