—Waiter, what about my food? I        for over 30 minutes.

—Oh, sorry , sir. Just one more minute ,please.

A．have waited                                                B．was waiting

C．have been waiting                                       D．had waited

-Waiter, what about my food? I ________ for over 30 minutes．

-Oh, sorry, sir．Just one more minute, please．

1. A.
   have waited
2. B.
   was waiting
3. C.
   have been waiting
4. D.
   had waited