你好,同学,正确答案选A. that

即：This house is the one that young painter had ever lived in when he was young.

翻译：这个房子是这个年轻的画家年少时曾经住过的那个房子.

解析：在定语从句中,如果先行词被the 等限定词修饰时,用that 引导,并且本题中的that 在定语从句中作宾语.

注意：如果介词in在前面,就应该用which,即：

This house is the one in which young painter had ever lived when he was young.
希望能帮到你,祝更上一层楼O(∩_∩)O
有不明白的请继续追问,可以详谈嘛(*^__^*)I want to visit the house ____she was born in. A . thatB. which答案选 A 为什么？介词后应该用which啊就像上面我说的一样，因为先行词前面用the特指，所以用that 引导，另外如果介词in 放在前面就可以选which了，即 I want to visit the house in which she was born.