------make(s) me happy?

几年级的水平啊?Swimming makes me happy, and I like swimming very much。 I learnt swim when I was 11 years old。 In summer I always go swimming。 I like laying my body on the water surface ,relaxing and staring on the skyflying with my ideas。 I think swimming is an important sport, because it make all the body moves。 It is a great sport that allows you to have fun at the same time of relaxing。