Lydia really regrets       out of high school . She has really had to struggle to make a living because of that decision .

A．drop        B．to drop     C．dropping D．dropped

Lydia really regrets ________ out of high school．She has really had to struggle to make a living because of that decision．

1. A.
   drop
2. B.
   to drop
3. C.
   dropping
4. D.
   dropped