三道英文选择题,简单说下原因43,we come to a place ______ they had never pa

三道英文选择题,简单说下原因
43,we come to a place ______ they had never paid a visit before.A,which B,in which C,on which D,to which 44,Is this lab ______ they visited yesterday?A,which B,the one C,that D,to which 45,The factory ______ you visited belongs to the lies.A,where B,which C,what D,when