The artist made up his mind to devote all the could __________ his English before going abroad.
A. improve     B. to improve    C. improving     D. to improving

The artist made up his mind to devote all the could __________ his English before going abroad.
A. improve     B. to improve    C. improving     D. to improving

The artist made up his mind to devote all he could ______ his English before going abroad．

       A．improve      B．to improve            C．to improving                D．improving

  .The artist made up his mind to devote all he could ____his English before

going abraod.  A.improving  B.to improve  C.imprve   D.to improving

The artist made up his mind to devote all he could ________ his English before going abroad．

1. A.
   improve
2. B.
   to improve
3. C.
   to improving
4. D.
   improving