GWD5-Q34

franciszmy

Many entomologists asy that campaigns to eradicate the fire and in the United States have failed because the chemicals that were used were effective only in wiping out the ant's natural enemies, which made it easier for them to spread.

A.which made it easier for them

B. which makes it easier for it

C.thus making it easier for them

D. thus making it easier for the ant

E. thereby, it was made easier for the ant

请为问这里第一个it指代什么，B为什么错。还有最后的spread在句意上时怎么理解的？谢谢！！

sjtupeeler

第一个it指代后面的不定式to spread，B当中出现了两个it，按照语法规则，同一句中的同一代词不能指代不同事物，B犯了这个错误，第一个it和第二个it肯定不是同一事物。

spread可以认为是蔓延，展开等意思

edmundshi

是选D吗？

it是"to spread"的形式主语

这题应该选动名词短语结构，用于描述前面一个句子描述的内容所产生的效果，即"wiping out the ant's natural enemies makes it easier for the ant to spread"之意，which不能指代一个句子，只能指代特定的词

spread为扩散、蔓延之意

franciszmy

明白了！非常感谢楼上两位的精彩解答