【正确答案】 C

【答案解析】[解析] 本题是说不要干涉与你无关的事。C项“concern涉及，有关于；使关心，使挂念”符合题意。如：This matter concerns all of us；I am not concerned with that matter any longer; His illness concerns me very much; be concerned with/about/for/over sth. “对……表示关心或忧虑”。注：过去分词作定语放在名词前面表示“关切的”，如with a concerned look；放在名词后面表示“有关的，相关的”，如we shall have to consult the persons concerned. 其他三项中，connect连接，联系(句型：connect A and/to B; The pipe connects with the sewer.); relate(使互相)关联(句型：relate A and/to/with B; relate to sth.); interest使感兴趣，引起……的关注，都与题意不符。所以，本题选C。