Complete the text with the correct form of the verbs

I [ ] my dog, Roger. It [ ] dark. We were walking past an old house when Roger ran into it. I called him out, but he didn't come back. I walked towards the house and opened the door. I was really scared. I [ ] for Roger when I saw a ghost. Then I came closer to the window. A white curtain [ ] in the wind. While I [ ] for my dog, I heard the steps behind me. I looked back, but I didn't see anything. I was walking along the corridor when a black cat ran past me. Roger [ ] in the backyard. I ran out of the house. I saw him digging the ground in the garden. He found three bones.