70-The word 'precious' is closest in meaning to_________
A. natural B. substantial C. first D. invaluable
Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the
correct word(s) for each of the blanks.
From the seeds themselves to the machinery, fertilizers and pesticides - The Green Revolution regimen
depend heavily on technology. One (71) ... , however, depends much (72) ... on technology -
organic farming. Many organic farmers use machinery, but (73) ...chemical fertilizers or pesticides. (74)
... chemical soil enrichers, they use animal manure and plant parts not used as food -,natural,organic
fertilizers that are clearly a renewable (75) ... Organic farmers also use alternatives for pesticides; for
example they may rely (76)...natural predators of certain insect pests. (77) ... the need arises, they
can buy the eggs and larvae of these natural predators and introduce them into their crop fields. They use
(78) ...techniques to control pests as well, like planting certain crops together because one crop
repels the other's pests. Organic farmers do not need a lot of land; (79) ...organic farming is
perfectly (80) ...to small farms and is relatively inexpensive. Finally, many organic farmers' average
yields compare favorably with other farmers' yields.
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