Английский язык, сравнительная и превосходная степень 5 класс. Найти ошибки

1. My school is BIGGER than this school

3. Some people think that watching sport is more boring THAN playing it

4. The Volga is THE longest river in the Europe.

5. Ethan is much WORSE at German than Jake

7. That's the most SILLY thing you've said today.