扫描二维码，直接登录
题库 / Prep2008E2-SC-202
Competition in the mid-nineteenth century by large western farms gradually caused farmers in Pennsylvania to turn to livestock raising, but before that it was predominantly grain-producing.
Competition in the mid-nineteenth century by large western farms gradually caused farmers in Pennsylvania to turn to livestock raising, but before that it was predominantly grain-producing.
Once predominantly a grain-producing state, competition in the mid-nineteenth century from large western farms gradually was causing Pennsylvania's farmers to turn to livestock raising.
Pennsylvania's farmers were gradually caused to turn to livestock raising by competition from large western farms in the mid-nineteenth century, but before that it was predominantly a grain-producing state.
It was once predominantly grain-producing, but competition in the mid-nineteenth century by large western farms was gradually causing Pennsylvania's farmers to turn to livestock raising.
Pennsylvania was once a predominantly grain-producing state, but competition in the mid-nineteenth century from large western farms gradually caused the state's farmers to turn to livestock raising.
1.IDIOM:
用competition from 来自XXX的竞争 而不是competition by例句：The firm was badly hit by competition from abroad.可排除ACD
2.that 做代词
一般代指单数或不可数名词 不会代指整个句子！！！而A和C的before that的that都是想指前面整句话（发生改变之前）
3.B的结构有问题 once a XXX state一个名词作为initial modifier， RON说过following subject必须要与这个名词对应 后面的competition显然不可以应该是Pennsylvania
4. D也是漏洞百出，用了competition by；开头的代词it和先行词隔得太远
就选E，其他都太ugly了不想说
it不能指代所有格！
A. competition from sb/sth；that不能指代整个句子
B. grain-producing state无法同位修饰competition
C. that不能指代整个句子；in the mid-nineteenth century修饰了large western farms错误，应该紧跟competition。
D.competition from sb/sth；cause用过去进行时错误。Pennsylvania's在's里不能被it指代
A. it指代错误，且that用法错误，不能指代前面出现的整个句子
B. a grain-producing state做了competition的同位语，错误;且不必要用过去进行时
C. 找it的先行词，显然不能是P’s farmers，符合单复数形式、能被it指代的是livestock raising，但带入划线部分替换it发现逻辑错误，因此it用法错误;that错误同A
D. It指代错误，同A
E. 正确