39. The bus left at 9 oclock and we arrived just after that. (when) A. When we arrived, the bus left. B. When we arrived, the

39. The bus left at 9 oclock and we arrived just after that. (when)
A. When we arrived, the bus left.
B. When we arrived, the bus has left.
C. When we arrived, the bus leaves.
D. When we arrive, the bus left.