OG 渣渣请教OG中关于they指代的问题

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The Iroquois were primarily planters, but supplementing their cultivation of maize, squash, and beans with fishing and hunting.


A but supplementing


B and had supplemented


C and even though they supplemented


D although they supplemented


E but with supplementing

答案是D 可是为什么这里的they不会指代不明呢  Iroquois 和 planters 都是复数啊 求指导！

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elusive 发表于 2016-4-15 14:01
原文的强调是表达转折关系
A：but句子缺少动词构不成转折关系。
B：没有使用过去完成时态的标志

谢谢楼主啦！我想是不是还有一个原因是题干自己也出现了their并且逻辑判断明显they指代的是I人，所以they才不会指代不明呢？