用 介词+关系代词 引导的定语从句改写下列句子

用 介词+关系代词 引导的定语从句改写下列句子
The girl got herself into a serious situation where she was likely to lose control over the motorbike
The girl got herself into a serious situation ______ she was likely to lose control over the motorbike
After living with his grandparents in the countryside for ten years,the boy returned to the big city where his parents worked
After living with his grandparents in the countryside for ten years,the boy returned to the big city ____ his parents worked
The process of curing a disease is like war where different soldiers fight against an enemy
The process of curing a disease is like war __ different soldiers fight against an enemy