প্রাইমারি শিক্ষক নিয়োগ প্রস্তুতি [লং কোর্স]৩২১টি পরীক্ষায় এসেছেপ্রশ্ন ৩৯Identify the correct sentence.কShe played music while she had been cleaning her room.খShe played music while she was cleaning her room.গShe played music while she had cleaned her room.ঘShe had played music while she had cleaning her room.উত্তর দেখুন