Fill in the prepositions: at, in, with, for from,

Fill in the prepositions: at, in, with, for from,
1. The inmates are registered ＿ the Processing Desk.
2. Searching prevents the inmate
disposing of contraband.
3. The officers must search the inmates illegal substances.
4. The police department is organized ＿ hierarchy of command.
5. Constables have the same duties ＿ the field as officers.
6. Officers receive a promotion afterthey have worked with a department several years.
7. Field operations division is tasked emergency and non-emergencyresponses.
8. Forensic officers work both ＿ crime scenes and ＿＿ the labs.