— How long have you studied English?  

— ______.

---How long have you studied English?

---______.

1. A.
   For 5 years
2. B.
   5 years ago
3. C.
   Since 5 years
4. D.
   5 years before

--- How long have you studied English?  
--- _____.

1. A.
   For 5 years
2. B.
   5 years ago
3. C.
   Since 5 years
4. D.
   5 years before