Final answer:
The demonstrative adjectives that complete the sentence are 'este' and 'ese'.
Step-by-step explanation:
The demonstrative adjectives that complete the sentence are 'este' and 'ese'.
'Este' is used to indicate something close to the speaker, while 'ese' is used to indicate something close to the listener but farther from the speaker.
For example, in the given sentence, 'este libro aquí es mi libro' would mean 'this book here is my book', and 'ese libro es tu libro' would mean 'that book is your book'.
Learn more about Spanish grammar