Ответ:

1. Though windsurfing is great, it can be tiring

2. Many people enjoy model making however others find it boring

3. Skiing is a thrilling sport, but it can be expensive

4. Dancing is fun as well it's a good exercise

5. Collecting seashells is free and it is relaxing too

Возможно 4 не совсем правильно, все остальное нормально