Oligopoly : যে অবস্থায় প্রতিযোগিতা অল্প কয়েকজন বিক্রেতা বা উত্পাদকের মধ্যে সীমিত থাকে;
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Appropriate Prepositions
Arrange for(ব্যবস্থা করা): We have arranged everything for our study tour.
Make up of (গঠিত): Village is made up of many homes.
Penalty for, with (দণ্ড, জরিমানা): She has paid the penalty for the misuse of power with two years in prison.
Play at (খেলা): I do not play at cards.
Repent on (নির্ভরশীল): He is repent on his parents.
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Idioms
Cut a sorry figure (খারাপ ফল করা): He cuts a sorry figure in the examination.
Fair play (প্রতারণা বিহীন নীতি বা কাজ): I believe in the practice of fair play in my business.
Rank and file (সাধারণ লোক): We should pay attention to the rank and file of the country.
Silver living (hope- আশা বা ভালো দিক): Every cloud has a silver lining.
Widow’s mite (দরিদ্রের ক্ষুদ্র দান): A windows mite is no less important than a large contribution of a rich man.