You usually travl down a river when you go c......... S.............

You usually travl down a river when you go c......... S............. is like surfing on the snow. If you gi s.......... - d.......... , you can see some fascinating things under the sea. Kids often practise s............ in the park or in the street. If you39;re good at c........... , you can get to the top of a mountain. S............ is a great спорт for people who like boats.