Complete the sentences with the correct comparative forms of the adjectives.

1. I am taller (tall) than my brother. 2. Is Superman stronger (strong) than Batman? 3. My cat is fatter (fat) than my dog! 4. My sister is better (good) at Maths than me. 5. The weather in the UK is worse (bad) than the weather in Spain. 6. There are more (many) people in Russia than in Greece.