Espero te sirva, justamente yo también estaba resolviendo este ejercicio >v<
Can you be more specific by making a question about what is your concern?
Answer for the first one: Cepillo mis dientes en la mañana.
Second one: Me peino con mi cepillo.
Third one : Decido si usaré una camisa roja o azúl.
Hope this helps .
Explanation:
TRUE -Verbs with infinitives ending in –ir form a third group of regular verbs, often called third conjugation verbs. To form the present tense conjugations of these verbs, drop the –ir from the infinitive and add the third conjugation endings (-o, -es, -e, -imos, -en) to the resulting stem.