1. As the UFO's door (open) and a small figure (appear), the
police (get) frightened.
2. It (turn) out that Branson (secretly / build) the hot-air-
balloon.
3. He (be) sorry that the poor weather conditions (spoil) his
original plan.
4. At first, the police (not see) the funny side and (want)
to punish the prankster but then they (join) in the laughter.