Competent authority : যোগ্য অধিকারী;
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Appropriate Prepositions
Ascend from (উপরে ওঠা): Rahim watched the mist ascending from the valley.
Congenial to(উপযোগী): The atmosphere is congenial to your health.
Famous for (বিখ্যাত): Smith is famous for his wisdom.
Fed up with (বিরক্ত): He is fed up with waiting for her.
Penalty for, with (দণ্ড, জরিমানা): She has paid the penalty for the misuse of power with two years in prison.
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Idioms
At the eleventh hour (at the last moment-শেষ মুহুর্তে adv.) The patient was in a dangerous condition and the doctor came at the eleventh hour.
Man of letters (পন্ডিত ব্যক্তি): You are truly a man of letters.
Pin money (স্ত্রীর দেয়া হাত খরচ)— She saved her pin money.
To and fro (hither and thither, এদিক ওদিক)-The man is walking to and fro.
Through thick and thin (through all difficulties, সমস্ত সমস্যার মধ্যে)-Ruma followed her husband through thick and thin.