this is a/one/the last question

[kadioguy]

If you don't mind, one last question:
Is it optional to add "the" before "sediment"?

https://www.usingenglish.com/forum/...ate-s-lands-were-formed?p=1726632#post1726632

a. If you don't mind, one last question:

b. If you don't mind, a last question:

c. If you don't mind, the last question:

d. If you don't mind, this is a last question:

e. If you don't mind, this is the last question:
----

What do you think about them? Do them all work?

GoesStation once revised (c) to (a) at https://www.usingenglish.com/forum/...-for-automatic-flushing?p=1673583#post1673583

But I'm not sure why.

 

[GoesStation]

https://www.usingenglish.com/forum/...ate-s-lands-were-formed?p=1726632#post1726632

a. If you don't mind, one last question:

c. If you don't mind, the last question:
----
GoesStation once revised (c) to (a) at https://www.usingenglish.com/forum/...-for-automatic-flushing?p=1673583#post1673583
But I'm not sure why.

Many final or "last" questions are possible. Here's one of them.

 

[kadioguy]

Many final or "last" questions are possible. Here's one of them.

But I meant to say, "that is the last question in that thread of mine."

 

[Tdol]

I don't like d) much.