[
  {
    "sentence": "Yo _____ compro. (the car)",
    "correct": "lo",
    "distractor": "la",
    "explanation": "Coche is masculine singular, so use lo.",
    "source_chapter": "17",
    "source_title": "Direct Object Pronouns"
  },
  {
    "sentence": "Ellos _____ tienen. (the houses)",
    "correct": "las",
    "distractor": "los",
    "explanation": "Casas is feminine plural, so use las.",
    "source_chapter": "17",
    "source_title": "Direct Object Pronouns"
  },
  {
    "sentence": "Quiero comprar_____. (it, masc.)",
    "correct": "lo",
    "distractor": "le",
    "explanation": "DOP attaches to the infinitive: comprarlo.",
    "source_chapter": "17",
    "source_title": "Direct Object Pronouns"
  },
  {
    "sentence": "Tú estás mirándo_____. (me)",
    "correct": "me",
    "distractor": "te",
    "explanation": "DOP attaches to the gerund with an accent: mirándome.",
    "source_chapter": "17",
    "source_title": "Direct Object Pronouns"
  },
  {
    "sentence": "Ella mira _____ Juan.",
    "correct": "a",
    "distractor": "el",
    "explanation": "Personal a is required before a human direct object.",
    "source_chapter": "17",
    "source_title": "Direct Object Pronouns"
  },
  {
    "sentence": "Yo _____ amo. (you)",
    "correct": "te",
    "distractor": "ti",
    "explanation": "Te is the DOP; ti is for after prepositions.",
    "source_chapter": "17",
    "source_title": "Direct Object Pronouns"
  },
  {
    "sentence": "Voy a leer_____. (the book)",
    "correct": "lo",
    "distractor": "los",
    "explanation": "Libro is masculine singular: leerlo.",
    "source_chapter": "17",
    "source_title": "Direct Object Pronouns"
  },
  {
    "sentence": "Nosotros _____ vemos a ellos.",
    "correct": "los",
    "distractor": "les",
    "explanation": "Standard DOP for 'them' (m.) is los.",
    "source_chapter": "17",
    "source_title": "Direct Object Pronouns"
  },
  {
    "sentence": "Yo _____ doy el libro a María.",
    "correct": "le",
    "distractor": "la",
    "explanation": "Indirect object (recipient) requires le, not the DOP la.",
    "source_chapter": "18",
    "source_title": "Indirect Object Pronouns"
  },
  {
    "sentence": "Ella _____ compra los libros (to us).",
    "correct": "nos",
    "distractor": "les",
    "explanation": "Nos = to/for us.",
    "source_chapter": "18",
    "source_title": "Indirect Object Pronouns"
  },
  {
    "sentence": "Yo _____ enseño los conceptos a ellos.",
    "correct": "les",
    "distractor": "los",
    "explanation": "Les is the IOP for them; los would be a DOP.",
    "source_chapter": "18",
    "source_title": "Indirect Object Pronouns"
  },
  {
    "sentence": "Quiero comprar_____ un regalo (to him).",
    "correct": "le",
    "distractor": "lo",
    "explanation": "IOP for the recipient him is le, attached to infinitive.",
    "source_chapter": "18",
    "source_title": "Indirect Object Pronouns"
  },
  {
    "sentence": "Estoy diciéndo_____ la verdad (to you).",
    "correct": "te",
    "distractor": "ti",
    "explanation": "Te is the IOP; ti is only after prepositions.",
    "source_chapter": "18",
    "source_title": "Indirect Object Pronouns"
  },
  {
    "sentence": "Ella le compra un coche _____ él.",
    "correct": "a",
    "distractor": "para",
    "explanation": "Clarification structure uses a + pronoun.",
    "source_chapter": "18",
    "source_title": "Indirect Object Pronouns"
  },
  {
    "sentence": "_____ doy el dinero a ellos. (I)",
    "correct": "Les",
    "distractor": "Le",
    "explanation": "Plural recipient ellos requires les.",
    "source_chapter": "18",
    "source_title": "Indirect Object Pronouns"
  },
  {
    "sentence": "Tú _____ escribes una carta a Emma.",
    "correct": "le",
    "distractor": "la",
    "explanation": "Indirect object 'to Emma' uses le.",
    "source_chapter": "18",
    "source_title": "Indirect Object Pronouns"
  },
  {
    "sentence": "Ella _____ da. (it to me)",
    "correct": "me lo",
    "distractor": "lo me",
    "explanation": "IOP comes before DOP: me lo.",
    "source_chapter": "19",
    "source_title": "Combining DOPs & IOPs"
  },
  {
    "sentence": "Yo _____ compro a él. (it for him)",
    "correct": "se lo",
    "distractor": "le lo",
    "explanation": "le + lo → se lo to avoid two l-pronouns.",
    "source_chapter": "19",
    "source_title": "Combining DOPs & IOPs"
  },
  {
    "sentence": "Tú _____ lees a ellas. (them to them)",
    "correct": "se los",
    "distractor": "les los",
    "explanation": "les + los → se los.",
    "source_chapter": "19",
    "source_title": "Combining DOPs & IOPs"
  },
  {
    "sentence": "Ellos quieren present_____. (them to you)",
    "correct": "ártelos",
    "distractor": "artelos",
    "explanation": "When attaching both pronouns to an infinitive, add a written accent: presentártelos.",
    "source_chapter": "19",
    "source_title": "Combining DOPs & IOPs"
  },
  {
    "sentence": "Ella está dándo_____. (it to me)",
    "correct": "melo",
    "distractor": "lome",
    "explanation": "Order is me + lo when attached to gerund.",
    "source_chapter": "19",
    "source_title": "Combining DOPs & IOPs"
  },
  {
    "sentence": "Yo puedo hacér_____ a él. (it for him)",
    "correct": "selo",
    "distractor": "lelo",
    "explanation": "le → se before lo; result attached to infinitive needs accent: hacérselo.",
    "source_chapter": "19",
    "source_title": "Combining DOPs & IOPs"
  },
  {
    "sentence": "Ella se lo escribe _____ él.",
    "correct": "a",
    "distractor": "para",
    "explanation": "Clarification uses a + pronoun (the IOP construction).",
    "source_chapter": "19",
    "source_title": "Combining DOPs & IOPs"
  },
  {
    "sentence": "Nosotros _____ damos. (it to you, sg.)",
    "correct": "te lo",
    "distractor": "lo te",
    "explanation": "IOP te before DOP lo.",
    "source_chapter": "19",
    "source_title": "Combining DOPs & IOPs"
  }
]