This question combines activities $1-8$ and $1-9$ on your book. If the noun given is plural, write the singular and if the noun is singular, write the plural. For example: If you see Ciudades you write: ciudad$1.$ discusiones $2.$ taxi $3.$ l$$piz $4.$ emoci$$n $5.$ d$$as $6.$ mesa $7.$ profesor $8.$ libertades $9.$ franc$$s $10.$ nietos