1) Her illness was more serious than we at first thought. (serious) 2) Sorry I'm late. It took me longer to get here than I expected. (long) 3) My toothache is more painful than it was yesterday. (painful) 4) She looks about 20, but in fact she's much more than she looks. (old) 5) The problem is not so complicated. It's simplier than you think. (simple) 6) Health and happiness are more important than money. (important) 7) We always go camping when we go on holiday. It's much cheaper than staying in a hotel. (cheap)
4. We eat the fourth at sea
5. Fifth day off
6. Sixth, all at home
7. I'm going for a walk in the seventh