Hardly had she walked out of the woods ＿＿＿ she heard the strange scream coming from behind a tree.

A.than     B.until   C.since D.when

Hardly had she walked out of the woods ＿＿＿ she heard the strange scream coming from behind a tree.

Hardly had she walked out of the woods ＿＿＿ she heard the strange scream coming from behind a tree.

1. A.
   than
2. B.
   until
3. C.
   since
4. D.
   when