Work in a hospital为什么不能用Work on a hospital

the hospital i work in sits on a beautifui mountain. He work in the hospital还是He work in hospital还是He work in a h she ___(work)in a hospital Do you work in a hospital? where do you work I work in a hospital 后面的work为什么这么填 she found a job to work in a hospital.to work in a hospital在 Jenny is a nurse and ( ) in Town Hospital A:work I work in a hospital.I'm a （ .） she found a job to work in a hospital.能解释为什么to work in a hos He said,"l work in a hospital."变成间接引语 Do they work in a hospital?(肯.否定回答) Her job is (t ) work in a hospital.