6, 7. (a) How widespread has modern - day warfare been? ( b) How has relative peace in some lands benefited our preaching work?
٦ ،‏ ٧ ‏ (‏ أ )‏ إِلَى أَيِّ حَدٍّ كَثُرَتِ ٱلْحُرُوبُ فِي ٱلْمِئَةِ سَنَةٍ ٱلْمَاضِيَةِ ؟‏