Only by practising a few hours every day _______ be able to master the language.

1. A.
   you can
2. B.
   will you
3. C.
   you will
4. D.
   can you

Only by practising a few hours every day _______ be able to master the language.

A. you can      B. can you         C. you will      D. will you

Only by practising a few hours every day ____ be able to master the language.

A. you can          B. can you       C. you will          D. will you

Only by practising a few hours every day ____ be able to master the language.