10. I ate _________ sandwich while I was waiting for _________ 20:08 train.
A. the, a B. the, the C. a, the D. a, a
which one is ok? uoud you, native speakers, please give me a hand to decide which one is the best choice and why?
Last edited by logoslogos; 28-Oct-2008 at 14:19. Reason: add new things