Spanish language Q&A Forum

I wrote a sentence using this format for a Baselang class and my teacher (from Venezuela) said it didn’t sound right except in the context of a list of excuses. 

Which tenses do these 3 forms represent? I suppose one is the usual conditional tense

There is a question/answer set that may need attention, unless I'm really having a memory lapse!

The question is...

Which sentence reaffirms the fact that he does know about it:

The answer choices are...

En cuanto lo sepa.
Sí yo lo supiera.
Sí que lo sé.

...with "Sí que lo sé" being marked as correct.

Again, unless I'm really forgetting something here... I think either the question should be...
"Which sentence reaffirms the fact that you do know about it:"

...OR the correct answer should be:
Sí que lo sabe.

If I am forgetting something here, I will be happily corrected/reminded!

Why is there a ‘por’ after pagar in the first example and not in the second?                           

No voy a aceptar que pagues por todo.

I am confused by when to use éstas with a tilde and when not to.  And would this sentence work without using either?  Just saying ...zonas de ocio sino que también permiten a la población...

The examples all list a couple actions that are being requested or suggested.  Would it be just as normal to use it when there is just a single action being requested?  Like "Pones los papeles sobre la mesa" would sound as normal as a command as "Pon los papeles sobre la mesa"?  As a non-native speaker, if I talked that way would people think I don't know the imperative?

 To me it seemed that the the word "da" didn't quite come through even when I replayed it.

Yo ________ que sí. Why is the answer he dicho and not hube dicho? I thought hube dicho is in Pretérito Perfecto and he dicho is in the present perfect. The quiz question says to answer in Pretérito Perfecto.