Standard error : ক্রটি প্রমাপ;
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Appropriate Prepositions
Aptitude for(স্বাভাবিক দক্ষতা, যোগ্যতা): He has no aptitude for public service.
Attacked by(আক্রান্ত ব্যক্তিবাচক): He has been attacked by a gang of robbers.
Concentrate on(কেন্দ্রীভূত করা): Try to concentrate your attention on your studies.
Senior to (বয়সে বড়): He is senior to me by two years.
Solution to (সমাধান): None can solution to every problem.
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Idioms
Dead language (যে ভাষা এখন আর কথ্য নয়): Sanskrit is a rich language, but it is now a dead language.
Of course (অবশ্যই): Of course, you know what that meant.
Pick one’s pocket (পকেট মারা)— He tried to pick my pocket.
Slip of the pen (লেখায় অসতর্কতাবশত সামান্য ভুল): The mistake is due to a slip of the pen.
Turn over a new leaf (begin a new phase of life, নবজীবন শুরু করা) —After his failure he turned over a new leaf.