Write "on; in; at" to correct the sentences

Write "on; in; at" to correct the sentences
1. Is there any milk ................ the fridge.
2. Nick lives ................... Italy with his parents.
3. Mark' s flat is ................. the fifth floor.
4. I' ll wait for you ............... the bus stop.
5. Please put your books .................... my desk.
6. What have you got ................... your bag?