ব্যাংক জব সল্যুশন১টি পরীক্ষায় এসেছেপ্রশ্ন ৬৫The police officers___the suspicious killing of a diplomat before a renowned businessman____ a couple of days ago.কক) had been investigating/was killedখখ) were investigating/ had been killedগগ) have been investigating/was killedঘঘ) were investigated/killedউত্তর দেখুন