英语:在括号内填入适当的关联词.1 they took care of the old man ( ) son lost his life in the fine.2.the scientist ( ) my father worked,w

英语:在括号内填入适当的关联词.1 they took care of the old man ( ) son lost his life in the fine.2.the scientist ( ) my father worked,went abroad last year.3.can you tell me the name of the company ( )you visited last week?