Ответ:

Синонимы

To study- learn

To speak- talk

Friendship-anity

To understand-realize

Big- large

Антонимы

native-alien

never- always

many- few

unknown- famous

to stay- don't stay

Ответ:

to study - to learn

to speak - to talk

friendship - comradeship

big - large

native - foreign

never - always

many - few

unknown - famous

to stay - to leave

Я делала, как могла, стараясь как можно быстрее, поэтому могут быть ошибки.