18. D) It grows easily in various conditions
19. D) Chocolate beans
20. B) They made native American foods popular
Part II Reading Comprehension
21. C) a possiblecause of aircraft crashes
22. D) They were suspected to have resulted from electromagnetic interference
23. B) the harmful effect of electromagnetic interference is yet to be proved
24. C) Because research scientists have not been able to produce the same effects in labs
25. A) is in favor of prohibiting passengers use of electronic devices completely
26. D) increased efforts of other countries in public relations
27. B) British companies place more importance on PR than U.S. companies
28. A) limited in outlook
29. C) are not as sophisticated as their European counterparts
30. A) American PR companies should be more internationally-minded
31. D) by chance
32. C) haven t yet found an effective measure to control their population
33. A) attributes it to
34. B) they have gradually changed people s way of life
35. B) The desire for consumption helps to reduce birth rate
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