1. improvement ( su cai thien)
2.performers ( ng trinh dien)
4. successful ( thanh cong)
5.collector ( ng suu tam )
7.accompanying ( good at + Ving)
8.information ( thong tin )
9.interested ( thich thu)
10.classify ( phan loai)
11.knowledge ( hieu biet ) -friendship ( tinh ban )
12.compete ( dau voi nhau )
13.traditional ( truyen thong )
14.participants ( ng tham gia)
15cycling ( dap xe )