El doctor me da ____ medicinas cuando estoy enferma.
Answer: algunas
Sentence: El doctor me da algunas medicinas cuando estoy enferma.
Translation: The doctor gives me some medicines when I am sick.
Explanation: indefinite adjectives are used to indicate an indefinite amount of something. An adjective has to agree in gender and number with the noun that accompanies it. Since "medicinas" is a feminine and plural noun, it has to be "algunas medicinas".
Spymore
