Standard time : প্রমাণকাল;
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Appropriate Prepositions
Authority on(বিশেষজ্ঞ পন্ডিত): Kamal was an authority on English literature.
Delighted at/with (আনন্দিত হওয়া): Sharmin was delighted at/with her husband’s promotion.
Hinge on/upon (নির্ভর করা): The whole matter hinges upon this clue.
Perfect for (সঠিক, মানানসই): The new book is perfect for you.
Repentance for (অনুতাপ): He has repentance for the past.
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Idioms
Cut a sorry figure (খারাপ ফল করা): He cuts a sorry figure in the examination.
Hard nut to crack (কঠিন সমস্যা): The problem of adult education is really hard nut to crack.
Part and parcel (অবিচ্ছেদ্য অংশ): Education is part and parcel to build a civilized nation.
Tooth and nail (তীব্রভাবে): He fought tooth and nail for the sake of country.
To go to the dogs (গোল্লায় যাওয়া)- He has gone to the dogs by keeping evil company.