8j. EL PLURAL DEL SUSTANTIVO. THE PLURAL OF NOUNS (Tema III, desde la página 27 hasta la pagina 33 de Gramática Inglesa para Estudiantes Españoles)

8j) Change the words in brackets into the plural form (Capítulo III, desde la página 27 a la página 33 de Gramática Inglesa para Estudiantes Españoles):

8j) Change the words in brackets into the plural form (Capítulo III, desde la página 27 a la página 33 de Gramática Inglesa para Estudiantes Españoles):
1. We asked him what was in the (box), specifically
2. Don't go after the (wife) or the (child)
3. I bought the (scarf) and gloves last week
4. The (ox) seemed tall as the sky to me
5. He's missing the (tooth).
6. The (bacillus was) spreading
7. That's how I fractured the (vertebra) in my back