GMAT语法考点中的in which和where的用法区别许多同学都不太清楚，出现在题目中也常会有人做错，下面小编将结合实例，为大家具体分析两者的使用方法相似和区别所在，帮助大家理清两者关系和正确用法。
GMAT语法大百科语法点：in which与where的用法说明
1. when , where 可以用在非限制性关系子句中
ex: He came from Herne Bay, where Lally had once spent a holiday.
2. when , where 也可以用在限制性子句中,但前面必须有特定的名词. 且像" Lodon" 这种专有名词的地名后面是不跟限制性子句的.
ex: This is the street where I live.
3. 在限制性子句中,
表time: 可用 at which 替代 when
表place, room, street, year, month: 可用in which 替代 where 及 when
ex: the place in which they found themselves.
表day 之后可用on which 替代 when
表 situation, stage, arrangement, system 之后, 可用 in which 替代 where, whereby.
所以, in which 常用在限制性子句中, (简单看就是前面不要有 ,)可以替代 where, when
1.时间year, month
2.地点 place, room, street,
3. 某种情境 situation, stage, state, arrangement, system
GMAT高频词汇in which与where用法实例讲解
At Shiprock, New Mexico, a perennially powerful girls’ high school basketball team has become a path to college for some and a source of pride for a community where the household incomes of 49 percent of them are below the poverty level.
(A) where the household incomes of 49 percent of them are
(B) where they have 49 percent of the household incomes
(C) where 49 percent of the household incomes are
(D) which has 49 percent of the household incomes
(E) in which 49 percent of them have household incomes
选项分析：
根据上述where和in which的用法总结，可以很轻易的判断D是不正确的
然后再按照句子意思来看，主语明显是收入，而不是人，所以排除B和E
A搭配错误，所以最后答案是C。
 

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