You missed a pretty complete explanation of the
take/takes discussion.  You are right in saying
that the object of a preposition will not be the
subject of a sentence.  What you need to focus on
here, though, is the fact that you need your verb
in the relative (or adjective) clause to agree with
the noun which it modifies: jobs.
 
Relative clauses have two ideas about a single noun.
You can write two sentences, in fact, about this noun.
In the sentence we're using, the two sentences would be
as follow:
 
        It was one of those jobs.
 
        Those jobs take ________ (whatever the original was!)
 
Note that "those jobs" has been replaced by the "that" when
this clause moves into its position after "those jobs" in
the revised sentenceised sentence:
 
        It was one of those jobs that take__________.
 
See?
 
Kathryn Gunderson
Department of English
California State University, Hayward
Hayward, CA  94542
Office Phone:  510-885-3245
EMail: [log in to unmask]
 
On Sun, 15 Mar 1998, ABenja3491 wrote:
 
> re: It was one of those jobs that (take,takes)...
>
> I look at it this way: I'd say one of those jobs that takes  because it seems
> to me that the subject of take/takes is one. If take agrees with jobs, then we
> have the object of a preposition serving as the subject, and that does not
> seem right to me. It was is complete as a main clause, is it not?
>