Answer:
The cycle of photosynthesis and respiration maintains the balance of oxygen and carbon dioxide. Photosynthesis produces the oxygen to replenish oxygen that is used up by living organisms during respiration. Carbon dioxide produced during respiration is one of the reactants plants need to perform photosynthesis.
Explanation:
She played all day. She helped her friend. Took care of her nephews all day. Studied for English class all day.
Answer:
1. habían (plusquamperfect preterit)
2. hemos (composed perfect preterit)
3. habías (plusquamperfect preterit)
4. había (plusquamperfect preterit)
5. he (composed perfect preterit)
6. había (plusquamperfect preterit)
Explanation:
These are all in two tenses: either plusquamperfect preterit (also known as pluperfect) or composed perfect preterit. They both form with the proper person of the verb plus the verb "haber". However, they have different uses. Plusquamperfect preterit refers to a time in the past earlier than a previously mentioned time. For example in number 4 we know Tomás arrived to the airport and then saw the plane had not landed yet, although both actions are in the past, one happened before the other. In composed perfect preterit, we refer to an action that occurred very recently and has finished. For example in number 2, the visit happened today which is fairly recent but not going on anymore.
I don’t know if they gave you specific words to put there but I can make up the sentences with words.
1. Mi mamá es tan inteligente como una científica.
2. Ella es una niña.
3. El es un niño.
4. Mi mamá es tan hermosa como una flor.
5. Ella es hermosa.
6. Mi papá es tan guapo como un modelo.
7. El es un amigo.
8. Yo soy tan feliz como un payaso.
9. Yo soy una persona alegre.
