gold is more expensive than silver but platnium is the most expensive 3 ostriches are taller than penguins but giraffes are the tallest 4 history is more intresting than science but geography is the most intresting 5 mencury is farer than earth but neptune is the farest 6 i am older than my friend but our teacher is the oldest 7 chocolattle cake is nicer than sausages but pizza is the nicest