VI. Mark the letter A,B,C or D on your answer sheet to indicate the correct answer to each of the following questions. 11.These vegetables are poisonous; they are _________ A. eatable                B. edible            C. inedible                     D. eaten 12.Lighting _________ for 30 percent of our electricity bill. A. accounts              B. makes           C. puts                                D. does 13.      Buy this kind of energy _________ bulb and you won't spend as much money on electricity. A. using                   B. saving           C. producing                D. consuming 14.      _________ the pollution in that river is awfully bad, the water is not fit to drink. A. Because of                     B. Since                   C. When                   D. Although 15.      Don't forget to turn _________ the lights when you leave the classroom. A. on                       B. out                     C. off                          D. up 16. We couldn’t buy anything because          of the shops were open.      A. all     B. half     C. most     D. none 17. If children don’t play sports, they         sleepy and tired.      A. would have felt     B. had felt     C. would feel     D. will feel 18. I didn’t eat everything that they                   me at the party.      A. served     B. shared     C. cooked     D. baked