Answer:
It wants you to fill out the blank spots or lines.
>_< ( brain stopped working for a second)
So in other words it wants you too fill it out like if you are talking to someone or what makes sense in the sentence. Example (*note this is not in the page i don't think*) Voy a comer ___ helado. the underline will be filled in with options of words that in that paragraph will have.
The words on the right are options that will make sense in the sentence . Make sure you read them with the sentence and it make sense and the spelling is correct too.
GOOD LUCK !! :D I am here for you . (Hope that help you)
*this sentence or story you could say is about school. In other words it says in some sentences this is my friend and we go to school together, and yeah so subject is school*