--- How can you keep slim as mother of two?

--- I have been        in the gym for years.

A．working out          B．carrying out          C．getting out          D．giving out

---How can you keep slim as a mother of two sons?

---I _______ in the gym for years.

A. have worked out                  B. have been working out

C. have worked on                   D. have been working on

---How can you keep slim as a mother of two sons?

---I _______ in the gym for years.

1. A.
   have worked out
2. B.
   have been working out
3. C.
   have worked on
4. D.
   have been working on

---How can you keep slim as a mother of two sons?
---I _______ in the gym for years.