42d. ORACIONES CAUSALES. CLAUSES OF REASON OR CAUSE (Tema 54, páginas 309 y 310 de Gramática Inglesa para Estudiantes Españoles)

42d. Chose the right words: because, because of, being, since, why, to complete the following sentences (Tema 54, páginas 309 y 310 de Gramática Inglesa para Estudiantes Españoles)

42d. Chose the right words: because, because of, being, since, why, to complete the following sentences (Tema 54, páginas 309 y 310 de Gramática Inglesa para Estudiantes Españoles)
1. The reason a good laugh makes you feel better is still a mystery
2. trained, Alonso knew what to do
3. The reason you haven't felt it is it doesn't exist
4. they couldn't fight, they would rather go and hide with their people
5. He will go on trial next week his political activities