A) Entra usted is your answer :)
Answer:
The central lowland is a vast plain land. It is suitable for agriculture as it is very fertile and rich for cultivation and supported by the beautiful and large rivers for irrigation.
Hope it helps :)
Answer: La viajera y la agente estaban hablando de la maleta perdida.
Explanation: The first one is not present progressive, is present simple. The second one is the answer in present progressive.
1.
2.
3.
4. está
5.
6. es
7. está
8. están
9.eres (?)
10. estas
11. somos
12. son
13. es
14. están
15. es
16. está
i don’t know the other ones they don’t make sense to my mexican self sorry