---Hadn’t your sheep gone much farther _______ you caught up with them?
---No,and we found _______ only two of them that were frozen to death.

1. A.
   when;it were
2. B.
   until;/
3. C.
   as;there was　
4. D.
   before;it was

—Hadn’t your sheep gone much farther _________ you caught up with them??

—No,and we found _________ only two of them that were frozen to death.?

A.when;it were             B.until;/?

C.as;there was　           D.before;it was ?