Is it the years-you worked in the factory-have a good effect

Is it the years_you worked in the factory_have a good effect on yourliterarywork?A that where ...Is it the years_you worked in the factory_have a good effect on yourliterarywork?A that where B that that答案是选A,我是这么分析的,第一个空填that,是强调句,不用when,第二空不应该填where呀,因为它句子不是缺乏成份吗?