Ответ:

2. Tigers are bigger than lions.

3. Italy is drier than Ireland.

4. February is shorter than January.

5. An iPod is cheapier than a laptop.

6. Mondays are worse than Fridays.

7. A fridge is colder than a cooker.

8. Russian is harder than Italian.

Объяснение:

Думаю, тут всё понятно, меняем сопостовляемые объекты местами, а глагол - на противоположный.