Well, your question is "How" do you answer the question, so I won't give you the answers (because I have no clue anyways)
Your simply answer 7-15 by filling in the missing word in the box. The sentences are missing words, and you have to find the correct form of that word that fits the sentence and makes it complete. In spanish, of course.
~Hope this helps!
Answer:
1._nosotros poder ir al partido
2._tu no ir a la fiesta
3._yo no comprar una bicicleta nueva
4._mis amigos poder ver una película está noche
5._felipe no jugar golf el sábado
6._usted no viajar a Argentina
7._ustedes no salir está noche