Counter signature : প্রতি-স্বাক্ষর;
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Appropriate Prepositions
Attend on/upon (সেবা করা): We should attend on/upon the ailing patient.
Call on(কারও সাথে দেখা করা): I called on him in his office.
Die of (রোগে মরা): Many people died of cholera.
Pity for (করুণা, সমব্যথা): I feel pity for this helpless old man.
Senior to (বয়সে বড়): He is senior to me by two years.
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Idioms
Fair play (প্রতারণা বিহীন নীতি বা কাজ): I believe in the practice of fair play in my business.
Kith and kin (নিকট আত্মীয়): He has no relation with his kith and kin.
Moot point (অমীমাংসিত বিষয়): Dowry system is still a moot point in Bangladesh.
Three R's (প্রাথমিক শিক্ষা)— He has not yet learnt the three R's.
To and fro (hither and thither, এদিক ওদিক)-The man is walking to and fro.