Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct word or phrase that best fits each of the numbered blanks from 25 to 29. Fill in the appropriate word in question 28
From the seeds themselves to the machinery, fertilizers and pesticides – The Green Revolution regimen depends heavily on technology. One alternative, however, depends much (25) _____on technology - organic farming. Many organic farmers use machinery, but not chemical fertilizers or pesticides. (26) ______ chemical soil enrichers, they use animal manure and plant parts not used as food - natural, organic fertilizers that are clearly a renewable (27) ______. Organic farmers also use alternatives for pesticides; for example they may rely on natural predators of certain insect pests. (28) ______ the need arises, they can buy the eggs and larvae of these natural predators and introduce them into their crop fields. They use other 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; in fact organic farming is perfectly (29) _______ to small farms and is relatively inexpensive. Finally, many organic farmers’ average yields compare favorably with other farmers’ yields.
A. Then
B. If
C. Because
D. Though
Chọn B.
Đáp án B.
Các đáp án:
A. Then: Sau đó
B. If: Nếu
C. Because: Bởi vì
D. Though: Mặc dù
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