Scientists think that algae first evolved approximately 2.7 billion years ago, and soon after this oxygen began to exist in the atmosphere. Photosynthesis by primitive plants and algae released oxygen, which gradually built up in the atmosphere.
Explanation:
Answer:
1. En el autobus
2.En carro
3.En avion
4. puede que en carro o avion
5.En carro por que es mas rrapido
6.En avion
7. En bicicleta
8.En ambulancia
Explanation:
Hi !!
Answer:
C- E<em>s cierto que + indicativo</em>
Explanation:
A- es probable que + subjuntivo
B- es increíble que + subjuntivo
C- es cierto que + indicativo ►<em>because it's positive. When negative form =></em>
<em>No es cierto que + subjuntivo</em>
D- es posible que + subjuntivo
☺☺☺
Where’s the text I can’t answer it without it
