Resposta:
1.
My friends are french.
Brazil is a beautiful country.
I am 20 years old.
2.
I live in Curitiba, Brazil.
She studies at Unicamp.
We work in evening.
Explicação:
Quanto à forma afirmativa do simple present, temos que:
Para os pronomes I, you, we e they, usar o verbo no infinitivo sem o "to". Exemplos:
I am friendly (to be).
You work hard (to work).
We travel sometimes (to travel).
They study a lot (to study).
Já para os pronomes he, she e it, acrescentar -s, -es ou -ies. Exemplos:
It rains every week (to rain).
She washes the dishes everyday (to wash).
He tries to learn Spanish (to try).
