Discussion Groups / English Usage / November 2006

Some sort of quantifier is required.

e) Yesterday, I saw some old friends from high school.
f) Yesterday, I saw some old friends from my high school.

Of your four, I would say (a) and (b) are nearly equal (if there is a
preference, it would depend on circumstances unstated in your
question); (d) would only be used for someone who is currently at a
high school other than the one both the speaker and the friends
attended; and (c) sounds old-fogeyish to me, but might be appropriate
if the speaker and the friends did not attend the same school.

-GAWollman