----Sixteen-year-olds should not be allowed to drive a car.

         ----I agree. They are ____________.

A. too serious                                                  B. not serious enough 

C. too calm                                           D. not enough serious

— Sixteen –year-olds should ____ to drive.

A. not be allowed    B. be allowed   C. not be allowed D. be allow

Sixteen-year-olds shouldn't be allowed to drive cars because they are not ________.

1. A.
   serious enough
2. B.
   enough serious
3. C.
   young enough
4. D.
   enough young