Mental arithmetic : মানসাঙ্ক;
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Appropriate Prepositions
Answer for(কোনো কারনে জবাবদিহি করা): He will have to answer for his misdeeds.
Attest to(প্রত্যয়ন করা): I like to attest to your ability.
Care of(যত্ন নেওয়া): You should take care of your health.
Deprived of (বঞ্চিত): He was deprived of education due to extreme poverty.
Search for (সন্ধান করা): The police searched the halls of residence for arms.
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Idioms
Acid test (অগ্নি পরীক্ষা): You must succeed in the acid test of the time you live in.45
All up with - (পুরোপুরি, হতাশ, সব আশা শেষ): If we can't, it's all up with the councillor.
Birds of a feather (persons of like disposition-একই পর্যায়ের লোক) Bird’s of a feather flock together.
Kith and kin (নিকট আত্মীয়): He has no relation with his kith and kin.
Man of letters (পন্ডিত ব্যক্তি): You are truly a man of letters.