Paying close attention to the gender of the nouns below, write its corresponding indefinite article (un, una, unos, unas). Ejemplo: mesa (f) > una mesa
1. libro (m)
2. ventanas (f)
3. afiche (m)
4. escritorio (m)
5. lápiz (m)
6. cuaderno (m)
7. chica (f)
8. chico (m)
9. salones (m)