Unit 1 phần D
1.F
2.C
3.H
4.B
5.E
6.A
7.G
8.D
III.
1.In the 1970s.
2.They are : "freestyle,ramp and free-style".
3.It was a combine of freestyle and ramp.
4.This allowed them to skateboard safety.
5.Yes,of course,now the technology is more and more modern that people can try this sport so easy.