Помогите!!!надо ошибки исправить (5 задание)!!! А в 4 вопрос задать

1  
Where do you live?

2  
What are you riding at the track today?

3  
What does BMX stand for?

4  
Why do you like cycling?

5  
How often do you practise here at the track?

6  
How many bikes have you got?

7  
How much do these bikes cost?