Q1: Empezamos
Q2: cierras; quiero
Q3: Prefiero
Q4: Pierden
Q5: Van
Q6: Quieren
Q7: Cierra
Q8: Van
Q9: Duerme
Q10: Estudiar para un examen
Q11: 4231
Q15: 1
Q16: Miguel y Yolanda
Q17: 1423
Q18: Telenovela
Q19: Juega
Q20: Jugar
Q21: Juegan
For future reference, a 'cognate' is a term that sounds the same, or very similar, in both Spanish and English. Also, for conjugation questions I would like to direct you to perhaps use SpanishDict.com, where you can view verb conjugations for every tense. I found that it helped me greatly through my Spanish language courses.
C. Los asuntos meaning issues
In english the sentence reads "The economy, the war, and safety are the msot important issues to the USA.
In spanish the sentence would read "La economia, la guerra, y la seguridad son los asuntos más importantes para los EEUU
