No estoy deacuerdo
No me agrada
Creo que no
Canto muy bien means "I sing very well."
True
It's Fuerte for man and woman same as one person or other but if you have multiple-choice and is not in there then it has to be Fuertoso singular and for plural fuertes or fuertosos. they are less common do.
Hope I had helped.
The indefinite article for the word libretas is unas