Random sampling : যদৃচ্ছা নমুনা সংগ্রহ;
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Appropriate Prepositions
Convince of(বিশ্বাস হওয়া): I am convinced of your efficiency.
Devoid of (বিহীন/বর্জিত): He is devoid of common sense.
Pleased with (সন্তুষ্ট): Shamim is pleased with all his employees.
Remedy for (প্রতিকার): There is no remedy for his misbehavior.
Run on (বিরতিহীন চলা): The bus is running on time.
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Idioms
At dead of night (গভীর রাতে) The police caught the thief at dead of night.
Fish out of water (অস্বস্তিকর অবস্থা): When he came to the village, he felt like fish out of water.
Irony of fate (ভাগ্যের পরিহাস): He could not succeed by irony of fate.
Read between the lines (understand the significance, অন্তনিহিত অর্থ বুঝা) Try to read between the lines of the letter.
Scapegoat (উদোর পিন্ডি বুধোর ঘাড়ে)—He was made scapegoat of the incident.