1.In/1970s, skateboarding suddenly/become very popular

In the 1970s, skateboarding suddenly became very popular .

2.At first, skateboarders/move slowly/flat, smooth areas.

At first, skateboarders moved slowly on flat , smooth areas.

3.Then they/begin/ride quickly. This/be called "freestyle".

Then they began to ride quickly .

4.Soon they/be skateboarding skillfully up ramps/ doing tricks in the air.

Soon they were started skateboarding and going tricks on the steets .

5.This/be called "ramp" skateboarding . Then they/start skateboarding/doing tricks/ the street.

This was " street style" skateboarding - a com bination of freestyle ang ramp .Then they were started skateboarding and doing tricks on the steets .

6.This/be "street-style'' skateboarding- a combination of freestyle/ramp.

This was " street style" skateboarding - a com bination of freestyle ang ramp .

7.For this, the skateboarder/ need protective clothing/as knee and elbiw pads/helmets. This/allow them/skateboard safely.

For this, the skateboarder needed protective clothing such as knee and elbow pads and helmets .This allowed them to skateboarder safety.

8.Today skateboarding is still/very popular sport, and there/are lots of competitions

Today skateboarding is still a very popular sport, and there are lots of competitions.