৫১তম বিসিএস ফাইনাল মডেল টেস্ট ও রিভিশন১টি পরীক্ষায় এসেছেপ্রশ্ন ৩৭Knocking at the door, she asked for my permission to come in. (Make it complex)কShe knocked at the door and asked for my permission to come inখAfter knocking at the door, she asked for my permission to come in.গAs she knocked at the door, she asked for my permission to come in. ঘShe asked for my permission while knocking at the door.উত্তর দেখুন