1. I log in ___ my computer at 9 AM.

    I log in to my computer at 9 am.

2. The office cafeteria is ___ the second floor.

    The office cafeteria is on the second floor.

3. My colleague sits ___ me in the office.

    My colleague sits at  me in the office.

4. There is a meeting scheduled ___ 2 PM.

    There is a meeting scheduled at 2 pm.

5. The documents are placed ___ the desk.

    The documents are placed in the desk.

6. I left my notebook ___ my drawer.

    i left my notebook on my drawer.

7. The team leader walked ___ the conference room.

    The team leder walked to the conference room.

8. The client call will be held ___ Monday.

    The client call will be held on monday.

9. Please place the report ___ my table before you leave.

    Please place the report  on my my table before you leave.

10. We usually have short breaks ___ lunchtime
        
    We usually have short breaks at lunchtime.