Complete the sentences with the correct form of the verbs in brackets. Sometimes more than one answer is possible.

1. We saw him ... (open) the box and ... (take) out a camera.
2. My school doesn't allow ... (eat) in the classrooms.
3. I am sure Greg didn't mean ... (upset) anyone.
4. I heard him slowly ... (walk) down the stairs towards the front door.
5. I can't remember ... (lock) my bike, but I am sure I did!
6. Could you please stop ... (shout) - I am trying ... (read) my book.
7. .... (smoke) isn't as common as it was in the past.
8. We could feel the fire .... (get) hotter and hotter as the flames got bigger.