৫১তম বিসিএস ফাইনাল মডেল টেস্ট ও রিভিশন১টি পরীক্ষায় এসেছেপ্রশ্ন ৬৫Change the voice: “Parimal's friends laughed at him”কক) Parimal was laughed at by his friends.খখ) Parimal was laughed at his friends.গগ) Parimal was laughed by at his friends.ঘঘ) Parimal was laughed by his friends.উত্তর দেখুন