1) Первый текст - which, learning, getting, seriously, harder, active, well.
Второй - whose, swapping, have, which, having, learning.
Третий - which, to visit, to go, where.
2) free time - Russia: the culture is thrilling and you never get bored.
Britain: swepping e-mails for British is a great fun.
school - Russia: Russian children study harder than British children.
Britain: British children more active than Russian children.
sights - Russia: the Kremlin and Tretyakov Gallery.
Britain: в текстах не нашла информации по этому пункту.
people - Russia: the people are nice.
Britain: swepping e-mails allows the British people to know Russia better.