A. PHONETICS I. Circle the word whose underlined part is pronounced differently from that of the other words. 1) A. supply B. dirty C. energy D. happy 2) A. decreased B. influenced C. endangered D. established 3) A. answer B. sweater C. swim D. switch II. Circle the word that has stress pattern different from that of the other words. 4) A. nature B. danger C. human D. environment 5) A. exist B. species C. effect D. condition 6) A. forest B. water C. destroy D. industry B. VOCABULARY AND GRAMMAR * Circle the best answer for each sentence. 7) Many rare ____ o animals are in danger of extinction. A. species B. classes C. beings D. pairs 8) People are destroying the environment by adding ____ to it. A. pollutes B. pollutions C. pollutives D. pollutants 9) Many efforts have been made to protect ____ nature. A. danger B. dangerous C. endanger D. endangered 10) Many species of animals are threatened and could easily become ____. A. disappeared B. vanished C. empty D. extinct 11) Many animals are ____ for their fur and other valuable parts of their bodies. A. hunted B. chased C. run after D. followed 12) They started a campaign to ____ smoking among teenagers. A. encourage B. decrease C. discourage D. prohibit 13) Dinosaurs became ____ millions of years go. A. disappear B. extinct C. lost D. endangered 14) The chemical ____ from cars and factories make the air, water and soil dangerously dirty. A. pollution B. polluted C. pollutants D. pollute 15) Human beings are ____ for the changes in the environment. A. account B. faulty C. blame D. responsible 16) By cutting down trees, we ____ the natural habitat of birds and animals. A. hurt B. would C. damage D. injure 17) ____ aren’t effective anymore because insects have become resistant to them. A. Fertilizer B. Pesticides C. Herbicides D. Composts 18) They started a campaign to ____ smoking among teenagers. A. encourage B. decrease C. discourage D. prohibit 19) He is the singer about ____ I often tell you. A. that B. who C. whom D. him 20) The concert ____ I listened last weekend was boring. A. to that B. to which C. for what D. for which