Miguel y Elena (cerrar) la puerta<span>.
Translation:
Miguel and Elena (to close) the door.
The infinitive must be conjugated according to the subject, which is plural (Miguel and Elena). It must also be in present tense. The conjugation of cerrar for a plural subject in present tense indicative is cierran.
Answer:
</span>Miguel y Elena cierran la puerta.
Answer:
Los deportistas (entrenan) en el gimnasio
Explanation:
because they go to the gym to train.
Solid, liquid, gas ^^
For example, if you have an ice cube you have a solid piece of matter, but if you heat it up it melts and then it's liquid, and after getting hot enough it evaporates and even though you can't see it it's still there, but as a gas.
By the way, what's this have to do with Spanish?