---When did you get to know each other ?

   ----It was in 2008___       we spent summer vocation together.

A . that     B . when       C . before       D . since

---When did you get to know each other ?

----It was in 2008___      we spent summer vocation together.

---When did you get to know the professor over there?
---It was at the work shop______we did reserch to gether two years ago.

1. A.
   that
2. B.
   there
3. C.
   which
4. D.
   where

---When did you get to know each other ?
----It was in 2008___      we spent summer vocation together.

—When did you get to know the professor over there?
—It was at the work shop     we did reserch to gether two years ago.