请教一道真题JJ 9

dreadpower

     我选E


     A中that指代了前面的句子，错


                             it指代不清，因为it was predominantly grain-producing，如果it指代Pennsylvania ，那么意思上显然很荒谬，Pennsylvania 怎么能是grain-producing？


    B         Once predominantly a grain-producing state修饰competition 错


C         还是that和it的问题


                 此外：by competition from large western farms in the mid-nineteenth century,双介词短语连用修饰，很容易造成不清楚


D：it问题


                     competition in the mid-nineteenth century by 错，作为竞争的受动者，应该用from，而非by。意思上很明显的错误