1. I ___ in the living room one day, when I ___ him scratching at the door.
1.1)
a) have sat
b) have been sitting
c) was sitting
1.2)
a) hear
b) heard
c) was hearing
2. When I opened the door I ___ to see him covered in dirt all over.
a) surprised
b) was surprprised
c) was surprising
3. I ___ Spot looking like.
a) have never been seen
b) never saw
c) had never seen