1. I phoned home. I arrived in the airport building. (immediately after)
2. She had already opened the letter. She realized it wasn't addressed to her. (before)

3. The building had almost burnt down. The fire brigade arrived. (by the time)

4. We realized that something had gone wrong. We saw him run towards us. (as soon as)
5. I'll give him your message. He will phone (as soon as)

6. We should visit the Duty-Free Shop. Our flight will be called. (before)

7. I'll be dead. They will find a cure for the common cold. (by the time)

8. You'll get a surprise. You will open the door.

9. The Air Traffic Controllers are on strike. We have cancelled our holiday. (as)

10. Could you sell your old computer to me? You have no further usefor it. (seeing (that)

11. She's never in when I phone. I'll have to write to her. (since)

12. I've had to have the document translated. I can't read Russian. (since)

13. I intend to go for a walk this morning. It's raining (even if)

14. I'd like to help you. I'm afraid won't be able to. (much as)

15. Your design is excellent. It isn't suitable for our purposes. (while)

16. I try hard to play the piano. I don't seem to improve. (although)

17. Chinese is so difficult. It's surprising how many people learn it. (considering that)

18. The play was wonderful. The film was a commercial failure. (whereas)

19. I arrived at the cinema early so as not to miss the beginning of the film.

20. We stood up in order to get a better view of what was happening.