如图几道题，由于不缺成分老师说可以用介词+which。但假如把正确选项换成where或者that可以吗？
那种情况下in which 和where，与in that和why可以相互替换？
25.考试试题剖析：考查定语从句。本题中的介词to是从动词return后面移至关系代词which前面。句意：风能是一种古老的能量来源，在不久的将来大家就会重新用它。Which指代前面的先行词an ancient sourceof energy作为介词to的宾语。动词return与介词to连用，故C正确。
26. in是和the way搭配的
另外定语从句that前面不能有介词
你可以较为全方位的再去补充语法点
这是刘永科老师的一个总结：
“介词 + 关系代词”结构解说：
“介词 + which”就是把介词提到关系代词which 之前，它是定语从句中容易见到的语言现象，也是一些网友不容易学会的一个语法项目，问题的重点是这个“介词”较难确定。但它是有规律可循的，有以下几种状况，解析如下：
1. “介词 + which”可以替代关系副词when, where, why
替代when
I'll never forget the day on which my son was born. 我永远忘不了我儿子生的那一天。（on依据on the day确定）
The year in which the earthquake happened was 2008. 发生地震的那年是2008年。（in依据in the year确定）
替代where
This is the office in which I used to work.这就是我过去工作过的办公室。（in依据in the office确定）
He forgot the exact place in which he had hidden the jewelry. 他忘记了埋藏珠宝的确切地址。（in依据in the place确定）
替代why
I'd like you to explain the reason for which you refused myoffer. 我想叫你讲解一下你拒绝我的帮忙是什么原因。（for依据for the reason确定）
2. 依据与先行词搭配的具体意义确定用什么介词
I'll never forget the time during which I was with my friends in thecountry. 我从来不会忘记和朋友们一块在乡村度过的时光。
I will offer you a better way in which you can do the job. 我要给你提供一个做这项工作较好的方法。
3. 依据定语从句中动词或形容词的搭配来确定介词
She bought several clothes, on which she spent all her money. 她买了几件衣服，这类衣服花光了她所有些钱。（on依据spend…on确定）
It is the grammar rules of which I am not sure. 我没把握的就是语法规则。（of依据be sure of确定）
4. 依据定语从句所表达的具体意思来确定介词
Can you see the river across which there is a bridge? 你能看见上面有座桥的那条河？
He is swimming in the river, on which there is a boat. 他在那条河里游泳，河面上有一只小船。
Here is the river in which I used to swim. 这儿就是我过去常在里面游泳的那条河。
【注意】
有的“动词+介词”短语被视为一个固定的词组，不可分割。这个时候不可以把介词置于关系代词前，如：listen to, lookat, look for, look after, care for, hear from, send for,等。
This is the right book for which I'm looking.
This is the right book that I'm looking for.
就是我要找的书。
除此之外，除去“介词 + which”以外，假如定语从句的先行词是“人”，那样也可以用“介词+whom”引导定语从句，比如：Mary is the girlfor whom I bought this gift. 玛丽就是那个我为其买此礼物的女生。