1.A. I’m afraid Mr. Brown is running a little late. He will be with you  as long asonceunlesswhileas soon aswhenin case his meeting finishes.
1.B. That is OK. I’ll do a bit of work  as long asunlessin caseas soon asoncewhenwhile I am waiting.

2.A. Hurry up! They won’t let us in the theatre unlesswhileas soon asas long asin caseoncewhen the play has started. And it starts in twenty minutes.
2.B. I’ll be ready to leave  whenas soon asunlesswhileas long asin caseonce I’ve sent these emails.
2.C. OK,  whenwhileas soon asin caseas long asunlessonce it doesn’t take too long.

3.A. I’ll take the navigator  whilewhenonceas long asas soon asin caseunless there is a problem with the traffic and I have to take a different route.
3.B. Good idea. I think you will be fine  in caseas long asonceas soon aswhenunlesswhile there is an accident or something. Anyway, let me know  as soon asin caseas long aswhileunlessoncewhen you arrive.