After his tutor leaves, John loads several MP3 files onto his portable MP3 player, with is much smaller than a portable cassette player.
(John loads several MP3 files onto his portable MP3 player, with; is; much smaller than a portable cassette player; T:After his tutor leaves)
John loads several MP3 files onto his portable MP3 player, with
is
much smaller than a portable cassette player T:After his tutor leaves