Ответ:
1. A rock is heavier than a leaf.
2. Our house is bigger than yours.
3. The princess is more beautiful than the witch.
4. Tom is a better student than Mary
5. Bicycles are safer than motorbikes.
6. July is hotter than January.
7. A lion is more dangerous than a cat.
8. Helen is happier than Mary
9. Computers are more expensive than telephones.
10. I think golf is more boring than football