প্রাইমারি শিক্ষক নিয়োগ প্রস্তুতি [লং কোর্স]১টি পরীক্ষায় এসেছেপ্রশ্ন ১৭As soon as the bell rang, the students left the classroom. (Negative)কNo sooner did the bell ring than the students left the classroom.খNo sooner had the bell rang than the students left the classroom.গNo sooner had the bell rung than the students left the classroom.ঘNo sooner had the bell ring than the students left the classroom. উত্তর দেখুন