Final answer:
The correct sentences with both direct and indirect object pronouns are 'Voy a pagárselo', 'Se las estoy preparando', and 'No sabe lo que quiere'.
Step-by-step explanation:
The correct sentences that contain both direct and indirect object pronouns are:
- Voy a pagárselo. (I am going to pay him/her/them for it.)
- Se las estoy preparando. (I am preparing them for her/him/them.)
- No sabe lo que quiere. (He/she doesn't know what he/she wants.)
In the sentence 'Voy a pagárselo', 'se' is the indirect object pronoun meaning 'to him/her/them', and 'lo' is the direct object pronoun meaning 'it' or 'them' (referring to something mentioned earlier in the context).
In the sentence 'Se las estoy preparando', 'se' is the indirect object pronoun meaning 'to her/him/them', and 'las' is the direct object pronoun meaning 'them' (referring to something mentioned earlier in the context).
In the sentence 'No sabe lo que quiere', 'lo' is the direct object pronoun meaning 'what' (referring to something mentioned earlier in the context).
Learn more about Spanish pronouns