Question

---Is your sister a worker or a doctor?
--- ________．

1. A.
   She is twenty．
2. B.
   No，she isn’t
3. C.
   She is a doctor
4. D.
   She likes her job

Answer 1

C
本题是一个选择疑问句，要么回答她是一名工人，要么回答她是一名医生，故本题选C。