Quero saber se a palavra grifada nas frases estão corretas, se não, qual seria a palavra ideal?(SÓ POSSO MUDAR A PALAVRA GRIFADA)

1)Do you have a Germand friend?

2)My parents have many friends. But they are not from Brazil.

3)Your cousin plays the piano very well.

4)A salesman is a businessman who sells things.

5)Do you want to be a skater?

6)My father isn't a driver, he is a lawyer

7)Who is he?

8)A student is a person study at a school or uineversity.

9)The Girl has a great voice

10)The skater is from Japan

11)I don't know that girl. Who is she?

12)I guess she is a new student here

13)The drummer do a lot of noise