Answer:
1. La clase del profesor Vega está planificándolo o La clase del profesor Vega lo está planificando (Professor Vegas´s class is planning it).
2. Gustavo y Héctor las confirman (Gustavo and Hector confirm them).
3. Nosotros los leemos (We read them).
4. Ana María lo estudia (Ana María studies it)
Explanation:
Sentence Nº 1: In the first sentence direct object noun is: “trip”, so we can rewrite it as it. Then the sentence will be: La clase del profesor Vega lo está planificando o La clase del profesor Vega está planificándolo (Professor Vegas´s class is planning it). When a sentence is written using progressive form, object pronoun can be placed before or after the verbs, therefore we can give two different answers.
Sentences Nº 2, 3 and 4: Direct object nouns in these sentences are: RESERVACIONES, FOLLETOS and MAPA. Sentences have only one verb (conjugated verb) so direct object pronoun can be placed only before the verb. Then there is only one final answer for each question.
Let´s study one by one:
*Sentence Nº 2: Direct object noun is RESERVACIONES. It is femenine and plural noun, so the object pronoun is LAS (them). Then the answer is Gustavo y Héctor las confirman (Gustavo and Hector confirm them).
*Sentence Nº 3: Direct object is FOLLETOS. It is masculine and plural noun, then the correct object pronoun is LOS (them). The rewrite sentence is: Nosotros los leemos (We read them).
*Sentence Nº 4: Direct object is MAPA. It is a masculine and singular noun. Then the direct object pronoun is LO (it): Ana María lo estudia (Ana María studies it).
Finally, remember Spanish direct object pronouns are:
First Person (I, yo) -- ME (me)
Second person (you, tú) -- TE (you)
Third person (he, she, it / él, ella, eso) -- LO, LA (him, her, it)
Plural (we /nosotros) -- NOS (us)
Plural (you / they) -- LOS, LAS (you, them)
