Of course, you'll be using CGI.pm for this task...

#!/usr/bin/perl -w
use strict;

use CGI qw(:standard);

open(FILE, '/path/to/file') or die "$!\n";
my @text = <FILE>;
chomp @text;

print header,
      start_html,
      start_form(-action=>'/cgi-bin/myscript.pl'),
      scrolling_list(-name=>'list',
                     -values=>\@text,
                     -size=>5),
      submit,
      end_html;
[download]

You might need to add a bit more HTML :)

"Perl makes the fun jobs fun
and the boring jobs bearable" - me

open(DATA,'file') or die $!;
print "<SELECT NAME=foo>";
while(<DATA>) {
  chomp;
  print "<OPTION>$_</OPTION>\n";
}
print "</SELECT>";
close DATA;
[download]

Or, using the handy function in CGI.pm,

use CGI qw(:standard);
# stuff 

open FILE, $filename or die "Can't open $filename: $!\n";
my @lines = <FILE>;
chomp @lines;
close FILE;
# more stuff


print scrolling_list(-name=>'foo',
                        -values=>\@lines);
[download]

Philosophy can be made out of anything. Or less -- Jerry A. Fodor