Anna is _____ to work out the math problems and gets a good grade. 

A. hard enough               B. enough hard

C. hard-working enough       D. enough hard-working

Anna is _______ to drive a car.

1. A.
   calm enough
2. B.
   enough calm
3. C.
   enough to calm
4. D.
   calm to enough

Anna is ________ to choose her own clothes．

1. A.
   allowed
2. B.
   allows
3. C.
   allowing
4. D.
   allow