The child told us he had been left alone by his step mother in the empty building.

A. The child had left his step mother alone in the empty building.
B. The child went to the empty building with his step mother, then she went away.
C. The child wanted to leave his step mother in the empty building.
D. The child had left his step mother before he went to the empty building.
E. The child wanted us to leave him alone with his step mother in the empty building.