English Wizard৬১টি পরীক্ষায় এসেছেপ্রশ্ন ১৫Which sentence is the correct one?কক) I have understood the matter long ago.খখ) I understood the matter long ago. গগ) I had understood the matter long ago.ঘঘ) I was understood the matter long ago.উত্তর দেখুন