Ihave a russian pen friend whose/who name is alexei. swap/swapping e-mails with him is a great fun. it's fun having/have a friend who/shich shares the same interests with you. we both like the same music, sport games and the same subjects at school. i've leant a lot of interesting things about russia from alexei. having/have a pen pal in russia makes you understand how many things are there to learn/learning.
2)Swapping
3)Have
4)Who
5)having
6)Learn