Những từ nào bạn điền sai hoặc chưa điền thì mik điền lại nhé :

far -> farther

fresh -> fresher

friendly -> more friendly

generous -> more generous 

good -> better

happy -> happier

high -> higher

little -> less

long -> longer

modern -> more modern

old -> older

peaceful -> more peaceful

pretty -> prettier

quiet -> quieter

smart -> smarter

soon -> sooner

strong -> stronger

ugly -> uglier

warm -> warmer

wonderful -> more wonderful

young -> younger