Answer:
1. Dos amigos y yo<em> FUIMOS</em> a Machu Picchu el verano pasado
2. Las vacaciones FUERON maravillosas
3. Yo también <em>FUI </em>al parque nacional de Manu
4. La gente <em>FUE</em> muy simpática
5. ¿Tú adónde <em>FUISTE</em> de vacaciones el año pasado?
Explanation:
If we want to produce sentences in Spanish we need to have:
A CONJUGATED VERB: It could be conjugated in any simple or complex tense (future, past, present, etc.)
If we also have a noun that acts like the SUBJECT (<u>remember that in Spanish it is not necessary to have an explicit subject</u> because you can identify through the conjugated verb if the sentence is referring to a singular or a plural noun), we will be putting special attention in the number aspect of the verb; thus if we have a singular subject our verb will be conjugated in a singular form, but if we have a plural subject then our conjugated verb will be conjugated in a plural form.
In this specific exercise we will be conjugating the verb that has been already given to us in infinitive form (<u>REMEMBER! Infinitive, gerund and participle forms of verb are not conjugated</u>; it means that they cannot be constructing a complete sentence by themselves), we will be focusing our attention in the subject of the sentence:
1. Dos amigos y yo<em> FUIMOS</em> (plural) a Machu Picchu el verano pasado
<u>PAST SENTENCE </u>
2. Las vacaciones FUERON (plural) maravillosas
<u>PAST SENTENCE </u>
3. Yo también <em>FUI </em>(singular) al parque nacional del Manu
<u> PAST SENTENCE</u>
4. La gente <em>FUE</em> (singular) muy simpática
<u>PAST SENTENCE</u>
5. ¿Tú adónde <em>FUISTE</em> (singular) de vacaciones el año pasado?
<u>PAST SENTENCE</u>