1. I (was) late for my flight because I (had parked) in the wrong terminal.
2. Your boss (has called) three times this morning.
3. It often (rains) in autumn.
4. Someone stole their hand luggage when they (were waiting) in the queue.
5. Jess was exhausted because she (had been waiting) for three hours for her flight.
6. He'll be here soon. He has just (left).
7. Take your umbrella in case it (rains).
8. Daisy had already (left) the airport when she (realized) she had the wrong suitcase.
9. My flight arrived late because it (had not taken off) on time.
10. After I (had picked up) my luggage I (took) a taxi to my hotel.
11. My mother couldn't move her legs because she (had been sitting) down for so long.
12. I (have beeen shopping) all morning. I'm exhausted.
13. I can't go for a walk. I (am helping) my mother.
14. Water (freezes) at 0°C.
15. When I (was walking) in the park the ducks (were swimming) in the pond and some children (were playing) football.