The answer would be E30. Hope I helped :D
B. Por because it’s saying the factory has been throwing away that industrial waste FOR many years in the river.
1) Limpie su cuarto.
2) Salgan temprano.
3) Ponga la mesa.
4) Hable con el profesor.
5) Compren los libros.
6) Prepare la comida.
7) Almuercen
I think 8-10 are correct the way they are I hope I helped
Corrections:
1.Adonde caminan..
2.De donde es el..
5.Donde es la clase..
8. Por que estudias..
