Answer:
The correct words that fill the blanks are:
1. Mis padres tienen dos hijos. Yo soy Eduardo y mi <u>hermana</u> es Anita.
2-3. Yo soy el <u>hijo</u> de mis padres y Anita es su <u>hija</u>.
4. Mi padre tiene una hermana. Es mi <u>tía</u> Isabel.
5. El <u>esposo</u> de Isabel es mi tío Enrique.
6. Tienen tres <u>hijos</u>: Carlos, Susana y Teresa.
7. Sus hijos son mis <u>primos</u>.
8. Carlos tiene diez años y Susana y Teresa tienen quince. Las dos hermanas son <u>gemelas</u>.
9-10. Los padres de mis padres son mis <u>abuelos</u>, yo soy su <u>nieto</u>.
11. Mi hermana Anita es también su <u>nieta</u>.
12. La esposa de mi abuelo es mi <u>abuela</u>.
13. Nosotros somos todos <u>miembros</u> de la misma familia.
14-15. Mi primo tiene <u>cabello</u> castaño y <u>ojos</u> azules.
Explanation:
To cover the blanks within the text, it is mostly <u>required to use words that refer to family members</u>, to better understand this fact below I will write the translation:
1. My parents have two children. I am Eduardo and my <u>sister</u> is Anita
2-3. I am the <u>son</u> of my parents and Anita is their <u>daughter</u>.
4. My father has a sister. She's my <u>aunt</u> Isabel.
5. Isabel's <u>husband</u> is my uncle Enrique.
6. They have three <u>children</u>: Carlos, Susana and Teresa.
7. Your children are my <u>cousins</u>.
8. Carlos is ten years old and Susana and Teresa are fifteen. The two sisters are <u>twins</u>.
9-10. My parents' parents are my <u>grandparents</u>, I am their
<u>grandchild</u>.
11. My sister Anita is also her <u>granddaughter</u>.
12. My grandfather's wife is my <u>grandmother</u>.
13. We are all <u>members</u> of the same family.
14-15. My cousin has brown <u>hair</u> and blue <u>eyes</u>.
As you can see, <em>mostly family relationships are mentioned in different ways in order to cover the largest number of members in a family</em>, with the exception of the last two blank spaces, where the applicable words are body parts.