Question 1 with 1 blankla profesora martínez es . question 2 with 1 blankrosa y teresa son . question 3 with 1 blanknosotros somos . difícil question 4 with 1 blankel curso es . question 5 with 1 blanklas pruebas son . question 6 with 1 blanklos libros son . alemán question 7 with 1 blankmis primas son . question 8 with 1 blankmarcus y yo somos . question 9 with 1 blankmi tía es . guapo question 10 with 1 blankmis sobrinas son . question 11 with 1 blanklos padres de ella son . question 12 with 1 blankmarta es .

The correct use of the adjectives in each sentence is:

1. La profesora Martínez es simpática.

2. Rosa y Teresa son simpáticas.

3. Nosotros somos simpáticos.

4. El curso es difícil.

5. Las pruebas son difíciles.

6. Los libros son difíciles.

7. Mis primas son alemanas.

8. Marcus y yo somos alemanes.

9. Mi tía es alemana.

10. Mis sobrinas son guapas.

11. Los padres de ella son guapos.

12. Marta es guapa.

Explanation:

The adjectives in Spanish can have four forms:

Though some adjectives don't have female form, the plural is in everyone, in the case of the adjectives given in the exercise, their forms are the next:

- Simpático.

- Difícil. (This adjective hasn't female form).

    3. Difícil.

    4. Difíciles.

- Alemán.

- Guapo.

For to know what adjective you must use, just ought to identify the noun and if it is male or female, and singular or plural, next use the suitable adjective taking into account the explanation above.