Question

what degrees of comparison are missing ?
tal - ........... - the tallest
old - ............ - the oldest
hot - hotter - .................
new - newer - ...................
............ - nicer - the nicest
............ - happier - the happiest
comfortable - .......... - the most comfortable
expensive - more expensive - ...................

Answer 1

tall- ..taller......... - the tallest
old - ........older.... - the oldest 
hot - hotter - ...the hottest..............
new - newer - .........the newest..........
nice............ - nicer - the nicest
......happy...... - happier - the happiest
comfortable - ..more comfortable........ - the most comfortable
expensive - more expensive - the most expensive

Answer 2

tall-taller,old-older,elder,hot-the hottest,new-newest,nice-nicer,happy-happier,comfortable-more comfortable,expensive-the most expensive