求教

maxhero

白勇编写的GMAT语法全解一书中，第六章平行结构，P149上说“不同功能的定语从句不能并列，因为关系词在定语从句中充当不同的成分。如：n.+where...and in which...不能并列”。
可是新东方GMAT补充材料上第56页第258题
（In feudal Europe, ruban areas developed from clusters of houses where peasants lived and commuted to farmlands in the countryside, unlike homesteading policies in the Amercan West that)required residency on the land itself in order to obtain eventual ownership.
答案将括号内的内容改成了(In feudal Europe, ruban areas developed from clusters of houses where peasants lived and from which they commuted to farmlands in the countryside, bu in the American West homesteading policies)
我选的这个答案，因为它最合适，但我不明白为什么这里where 和in which 能够并列。我认为句中的谓语是developed，那么where 和in which 应该都是修饰clusters of houses。
哪位牛人能够予以解答，不胜感激！

jnlvo

是where和from which并列吧？其实就是lived in houses和commuted from houses to farmlands，这里where相当于in which。而from which是不能用where代替的，这样表达不清楚。

maxhero

谢谢斑竹的解答~~