Please help me conjugate this

Which part of this sentence is not correct? esta muchacha tan bonito es alta. a. muchacha b. bonito c. esta d. alta

Describe a situation where you heard another language being spoken. did you know what language it was? were you able to understand what you heard? write a four- or five-sentence paragraph, in english, that describes this experience. write in english.

Anoche yo porque tengo un examen muy dificil hoy