1. until/when he arrives, everyone must stand. 2. please phone your dad by the time/immediately. 3. as soon as/ before you hear the alarm, run for the exit. 4. supposing/in case you had a baby girl — what would you call her? 5. we’re not going to stop digging until/ as soon as we find the ancient ruins.
1. When
2. immediately
3 As soon as
4 Supposing
5 until