Answer:
the verb would be "<em><u>V</u></em><em><u>E</u></em><em><u>N</u></em><em><u>I</u></em><em><u>R</u></em><em><u>"</u></em><em><u> </u></em>
Answer: Cuestan.
Explanation: Cuanto means How much in english, so the question is asking how much those books are going to cost. Whenever you see a Cuanto in a question like that, assume it's talking about a number of something, or money. So Cuestan means cost, in the terms of "How much does this item cost?".
The quincenero means a boy (Because of ending in O) that is turning 15.