Longstanding : দীর্ঘকালস্থায়ী;
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Appropriate Prepositions
Abound with(ছেয়ে থাকা): They live in a region that abounds with oil.
Admit into(প্রবেশ করতে দেওয়া): Only the selected people were admitted into the theater.
Contribution to (অবদান): His invention made a major contribution to road safety.
Destitute of (নিঃস্ব; বিবর্জিত): He is destitute of any friend here.
Guilty of (অপরাধী/দোষী): The convict was guilty of murder.
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Idioms
Call to mind (স্মরণ করা): I cannot call to mind your cell number.
Fish out of water (অস্বস্তিকর অবস্থা): When he came to the village, he felt like fish out of water.
Hard nut to crack (কঠিন সমস্যা): The problem of adult education is really hard nut to crack.
Man of letters (পন্ডিত ব্যক্তি): You are truly a man of letters.
Put the cart before the horse (to reverse the natural order of things-কোনো জিনিসের স্বাভাবিক ক্রমকে পাল্টে দেয়া) - The leader put the cart before the horse.