Spanish language Q&A Forum

The correct answer to one of the questions is "prefiero que ellas cocinéis las paella".  ¿Y cómo?

Could you explain the quiz quiestion that I got wrong? I chose "eso", for "I like that one" (a boligrafo). The correct answer was "ese". Yet "eso" is listed a correct option in the lesson if the object is not named in the sentence. Thanks. 

In "ellos consiguen borrar los malos pensamientos de su cabeza," why is it not "de sus cabezas" since we said "ellos"? 

I understand that plural feminine should be -as and plural masculine should be -os... The hint that they are feminine names made me opt for Delgadas but the answer was Delgado's... Why?

Is there any advice to practice the rythm of spanish?

Él habría abierto la puerta.He would have opened the door.The speaker really says Habriabierto. 
I think spanish should be taught this way but then how would that work?