Spanish language Q&A Forum

I'm having trouble consistently distinguishing between using 'a' or 'en' when talking about being somewhere.

For instance, in the dialog, "... Alberto estará  en la reunión...", 

Would we say "estará en la reunión" to mean someone will be 'in' the meeting, while "estará a la reunión" has a connotation indicating a location 'at' the meeting?

Or is it always customary to use 'en' in cases like this?

Cuales son los diferente tipos de fauna que se encuentran en el pantanal 

son peligrosas o inofensivas ?

dependiendo de el país la flora cambiará en el pantanal?

In the test question, How would you say "I have eaten only fruit for a week."?, the answer was Desde hace una semana solo como fruta.

But I chose Desde hace una semana solo he comido fruta. Why isn't that one correct, given the "have eaten?"

de punta en blanco - wordreference is giving me a different definition. could this be reviewed? thank you!

The English similarity although we don't use it anymore, they are growing up on us without us realizing or she is not eating on me and I am worried.

menos ustedes is correct.  menos Uds is wrong.  Why?

What if you want to say I have to finish the speech for Thursday (instead of by Thursday) in the sense that it is Thursday's speech? Would it be, Tengo que terminar el discurso que es para el jueves? o el discurso de jueves..? 

Gracias, 

QWhat Is the difference between estuve/estaba/era/fui

Va vestido elegantemente, va pegando a los pobres. I can’t find lesson note on this or in dictionary. May I know if this is a grammar point such as ver + participles to mean something ?

https://progress.lawlessspanish.com/my-languages/spanish/tests/take/3466192

this one is in English and no way to get correct answers