The forum is FULL of example, use SEARCH function first:
http://forum.mikrotik.com/t/importing-ip-list-from-file/143071/8
http://forum.mikrotik.com/t/help-with-error-in-script-to-import-the-ipv4-full-bogons-list-from-www-team-cymru-org/113429/4
But I prefer mine because file size limit are little, and I prefer read IP than read replicated commands that use more space than single IP,