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
【S1】
选项
答案F
解析 根据句子结构的分析可判断此处需填入一个动词原形，可选范围缩小到A、C、F、 H、M和N，根据冒号后面的内容，显然是在对marginal land进行定义，故答案为F。
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大学英语四级

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