新SAT写作官方Daily Practice每日一练

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One of the primary shortcomings of the Homestead Act of 1862, a program

through which the federal government offered free plots of land to US citizens

willing to establish farms in the American West, was that the plots were too

small to sustain a farm. Land in the semiarid Great Plains region received

twenty or fewer inches of rain per year, so plots there were best left half

unplanted each growing season to conserve water. With farms consisting of a mere

160 acres, however, this practice would not have produced sufficient harvests.

Moreover, raising cattle was impossible because the tiny homesteads would

quickly become overgrazed. According to geologist and explorer John Wesley

Powell, sustainable homesteads on the Great Plains actually needed to be a

staggering 2,560 acres.

A.NO CHANGE

B.Farms consisted

C.Farms that consisted

D.Farms, consisting

重点单词：

sustain [səs'tein] vt. 承受，支持，经受，维持，认可

sufficient [sə'fiʃənt] adj. 足够的，充分的

willing ['wiliŋ] adj. 愿意的，心甘情愿的

impossible [im'pɔsəbl] adj. 不可能的，做不到的

primary ['praiməri] adj. 主要的，初期的，根本的，初等教育的

conserve ['kɔnsə:v,kən'sə:v]n. 蜜饯，果酱vt. 保存，与糖放在一起，

cattle ['kætl]n. 牛，家畜，畜牲

答案：A

解析：

Choice A is the best answer because it results in a grammatically complete

sentence.