Combine the sentences, using double comparative

Combine the sentences, using double comparative
5. I learn much. I understand much.
______________________________________________________________
6. The apartment is big. The rent is high.
______________________________________________________________
7. We set off soon. We will arrive soon.
______________________________________________________________
8. The joke is good. The laughter is loud.
______________________________________________________________
9. She gets fat. She feels tired.
______________________________________________________________
10. As he gets older, he wants to travel less.
______________________________________________________________