1. Anoche no pude dormir hasta que cierre la ventana
2. Vamos a cantar juntos en cuanto llegue el pianista
3. manana, cuando vengas a mi casa, vamos a hablar de tus planes
4. Antes de que tu te vayas quiero contarte algo
5. Habla con ella antes de que llame a su mama
The correct answer for the blank is musicales.
Me gusta mucho tocar el piano. Por eso me fascinan los musicales.
Following Certain expressions and verbs such as tener que, ir a, poder o gustar.
For impersonal commands
Answer:
a problem is researchable only if it can be scientifically proven
Explanation:
In science, a problem can be defined as a statement, condition, difficulty or question which is investigated by using the scientific method. In the scientific method, first is required to raise a possible explanation or 'hypothesis', which is based on objective inferences. Second, from this hypothesis, it is possible to make predictions which are subsequently proved or rejected by carrying out experiments and/or empirical observations in order to finally obtain results and conclusions about the researchable question.