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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