My father is a doctor．He works _________．

1. A.
   in a hospital
2. B.
   in hospital
3. C.
   of the hospital
4. D.
   at hospital

My father is a doctor．He works _________．   

          A．in a hospital     B．in hospital     C. of the hospital    D．at hospital

My father is a doctor and my mother is         office worker.
A. a                        B. an                   C. the