【正文】
big D. mountainous 6. B. each C. all D. neither 7. B. reduce C. increase D. continue 8. B. but C. or D. however 9. B. hardly C. partly D. never 10. B. lacked C. found D. expected 11. B. protecting C. disturbing D. interrupting 12. B. lost C. discovered D. used 13. pollution B. Water pollution C. Some diseases D. All farmland 14. B. plants C. forests D. people 15. be true B. will e true C. can’t be true D. may be wrong 16. B. develops C. exists D. appears 17. B. working out C. answering D. dealing 18. B. still C. less D. plenty of 19. B. in C. out D. for 20. B. suggesting C. spending D. waiting 答案 基礎(chǔ)落實(shí) Ⅰ. Ⅱ. bacteria nutrition mineral discovery root summary regret reduce skim underline ment Ⅲ. up to on ...free from/of damage to addition to Ⅳ. to on confused about to to free from Ⅴ. well as addition seven days expanding 6. made ments on Ⅵ. 2. D 3. C 4. D 5. C 6. B 7. B 8. A 9. A 10. A Ⅶ. Hunger used to be disturbing in this the past decade, farmers succeeded in the struggle against the expanding with new farming methods, their output of grain and other crops has increased. 能力提升 1. D 2. B 3. C 4. D 5. A 6. B 7. C 8. B 9. A 10. D 11. A 12. B 13. A 14. C 15. D 16. C 17. A 18. B 19. C 20. D