已解决
前三道题是一个问题———关系代词和关系副词的问题。这类题的解决方法是：
1、确定为定语从句后，可把先行词（被修饰的词，此处为job）试着放到后面的从句中。
2、如果不需要添加介词就可以完整的表达一句话，连词就选用关系代词：that， which， who，whom；
3、如果需要补充介词才能成句，则用介词+关系代词，而且，此时若先行词为表示时间、地点、原因的词，也可以相应的用关系副词when，where，why。
如：This is the factory ______ I visited last year.
(which)
(I visited the factory last year.)
This is the factory ______ I worked last year.
(in which或用where）
(I worked in the facotry last year.)
第一题：It was hard for him to learn English in a family, in which neither of the parents spoke the language.
（neither of the parents spoke the language in the family.）
第二题：
I'll give you my friend's home address, where I can be reached most evenings.
（I can be reached at the address most evenings.）
第三题：
She showed me the building where she had once worked , the neighborhood where she had lived.
(she had lived in the neighborhood.)
第四题：她觉得自己只是一个小人物。
对“4个英语句子帮着分析一下＝百分送上＝（详细点）”其他回答
1 It was hard for him to learn English in a family, in which neither of the parents spoke the language.
这句话中 in which 是什么意思？是什么成分？
这是个定语从句，in which... 后面都是修饰family的。意思是在一个父母都不说英语的家庭里。
2 I'll give you my friend's home address, where I can be reached most evenings.
这里为什么用 where？而不用which？
如果用which的话必须加上个介词，如in,at等（可参考第一个问题）。不用介词的话必须用where.
3 She showed me the building where she had once worked , the neighborhood where she had lived.
为什么 worked 和lived 后面没有加in？ 我觉得应该加上in才对……
同2，因为用了where, 所以不必用in这样的介词
4 She felt herself a nobody.
这一句怎么翻译？
可译作：她觉得自己什么都不是。
一家之言，仅供参考。
