Answer:
These are direct object pronouns for it and them:
<em>lo</em> = masculine singular nouns, <em>por ejemplo, </em><em>el piano </em>
<em>la</em> = feminine singular nouns, <em>por ejemplo, </em><em>la música</em>
<em>los</em> = masculine plural nouns, <em>por ejemplo, </em><em>los pianos </em>
<em>las</em> = feminine singular nouns, <em>por ejemplo, </em><em>las canciones</em>
Enter the corresponding object pronoun to replace the noun.
Explanation:
Remember: when there are 2 or more subjects, you use the -an/-en conjugation.
1. trabajan
2. estudian
Yo estube enfermos los dos primeros dias