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cookies0909

Although the lesser cornstalk borer is widely distributed, control of them is necessary only in the South
A.the lesser cornstalk borer is widely distributed,control of them is
B. widely distributed,measures to control the lesser cornstalk borer are
C. widely distributed, lesser cornstalk borer control is
D. the lesser cornstalk borer is widely distributed, measures to control it are
E. it is widely distributed, control of the lesser cornstalk borer is

答案选D，我想问although前后两句主语不是要一样的吗？D选项，前句主语the lesser cornstalk borer，而后句主语却不是这个
以往做题，我会扫一下选项，it一般出现在句后都有指代不清的现象，是有这样的规律吗？
请问C选项哪里有问题？

clumsy123

介个。。。没有说although从句和主句的主要一定要一样，只是在although 从句省略主语的情况下才要求和主句主语一样，c 选项很明显就省略的主语和主句主语不同。关于代词指代，我没有很好的方法，不过有几个原则可以用：1，如果单数代词前面出现好几个单数名词，一般是就近指代 2，如果代词做第二个句子的主语，一般指代的是前一个句子的主语；其他很多时候都是通过逻辑意思的判断。

wakemeup

C是典型的状语从句的省略结构
要搞明白句义是说measures 是necessary的，不是control是necessary的