Resposta :
1. I have one brother .He's twenty yeaes old .
2. I like my classmates . they're friendly .
3 .katy and I like in a big house .we're roommates .
4. I go to school .I'm a student.
explicação:
O verbo to be na forma curta é junto com o pronome He + is = He's <
Espero ter ajudado!