b. A lion is faster then a cat, but the tortoise is very slow.
c. Scandinavia is a beautiful place, but i would like to visit a country in Africa, because in the South Pole is very cold.
d. The cars and trains are fast, but the planes are the fastest to travel with.
e. A stone can be heavier then a piece of wood, but the iron is heavier then both.
f. I like lemons and oranges, but i prefer bananas because they are sweet.