Spanish language Q&A Forum

After explaining the whole story (which happened "hoy") with preterito perfecto , why did we use  Preterio Indefinido in the end? 

: el profesor me felicitó.

I thought it would have been "me ha felicitado"

Is it incorrect to not use the contraction in Spanish.  Whereas, in English, it is NOT incorrect to not use the contraction.  For example, "do not" is as acceptable as "don't."  Is "a el" acceptable, or incorrect?  Thank you.

Aunque with subjunctive when information is shared / background - why? I can't find this elsewhere, only that the subjunctive is used if the information is unimportant or irrelevant. Is this what this statement on 'shared' really means?

Necesito el coche hasta el sábado

Tengo que terminar los informes hasta las cinco

When do you use qué and when Cuál?

As per what I understood qué translates to what whereas Cuál translates to what or which. 

Then , in the starting line, why can't it be Cuál... as in "Which (food) do you like...?"

In one quiz there was a sentence:   Hace calor.  Saldré al jardin un rato.   Voy a salir  sounds more natural and is what I hear more often from South Americans. Is the use of the future tense more common in Spain?

It appears that a space is missing in the bullet point: "in the subordinate sentence after quererque we use El Imperfecto Subjuntivo." 

It looks like a space may be needed in "quererque" to divide this into two words: "querer" and "que." Or is there a circumstance in which it would be correct to combine these?