Xavier likes to study, which means the second option, because "Soy intelgente y me gusta estudiar.", means that "I am intelligent and I like to study."
Answer:
No están seguros de que Pedro pueda dejar de fumar.
No es evidente que estés agotado.
No creo que las medicinas naturales son curativas.
No es verdad que la cirujana quiera operarte.
Es seguro que este médico conoce el mejor tratamiento.
Explanation:
They are not sure that Pedro can quit smoking.
It is not obvious that you are exhausted.
I do not believe that natural medicines are curative.
It is not true that the surgeon wants to have surgery.
It is certain that this doctor knows the best treatment.
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?".
A tiempo
Necesito llegar a clase a tiempo.
Sophie necesita agua porque tiene sed.
