1. as...as
2. not as...as, less...than
3. less...than, not as...as, more...than
1. Italy is not as big as Russia.
2. Hamsters are less dangerous than snakes.
3. The River Thames is not as long as the Amazon.
4. A kilo of gold is as heavy as a kilo of rice.
5. Chocolate is less expensive than caviar.
