This house is the one ____ young painter had ever lived in w

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.
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用 which。因为它在定语从句中做live in的宾语

用 which。因为后面有live in，