QWhat is bigger, this sandwich or that hot dog?
AThis sandwich is bigger than that hot dog.
QWhat is higher, a mountain or a hill?
AA mountain is higher than a hill.
QWhat is more expensive, gold or silver?
AGold is more expensive than silver.
QWhat is faster, a train or a car?
AA train is faster than a car.
QWhat is heavier, an elephant or a bear?
AAn elephant is heavier than a bear.
QWhat is more difficult, math or English?
AMath is more difficult than English.