2. 外语
  3. To call something "marginal" means it is not very good. Farmers have their own way to【S1】______marginal land: It is the last to

To call something "marginal" means it is not very good. Farmers have their own way to【S1】______marginal land: It is the last to

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问题     To call something "marginal" means it is not very good. Farmers have their own way to【S1】______marginal land: It is the last to be planted under good conditions, and has the【S2】______to be avoided under poor conditions. Low【S3】______soil is not the only reason land could be considered marginal. It might be in an area where rainfall is【S4】______or where a hillside might rise too steeply(陡峭地).
    There are uses for marginal land, however.  Most often it is used as grassland. Grasses provide excellent【S5】______for grazing(吃草)animals like cattle, sheep and goats.  Grass seed can be bought from a foreign supplier or【S6】______grasses can be used. However, using marginal land for grazing is not a simple issue. There is a【S7】______of overgrazing. Cattle can damage the crops by eating down to the roots. Also, the weight of the animals crushes the soil and can make it too hard for growing. A(n)【S8】______way to reduce the harm is to move animals from one field to another. This method is known as rotational grazing(循环放牧)which is extremely important for marginal land.
    Another use for marginal land is for tree crops. Studies have【S9】______that the white pine and loblolly pine(火炬松)are two kinds of trees that grow well on such land. They grow fast and provide good quality wood. Another tree is the poplar(白杨), found in many parts of the world.
    Failure to take the care needed to protect marginal lands can make a bad situation worse. But good planning can【S10】______a marginal resource into a highly productive one.

A)feed                                          I)discouraging
B)priority                                      J)quality
C)transplant                                    K)native
D)effective                                     L)revealed
E)limited                                       M)prejudice
F)define                                        N)hazard
G)adequate                                      O)recovered
H)transform
【S8】
选项
答案D
解析 此处需要填入一个形容词或相当于形容词功能的词，根据下下文的描述可知，这里是指一个有效的方法，因此正确答案为D。
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大学英语四级

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