Authenticates : বিশুদ্ধতা প্রমাণ করা;
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Appropriate Prepositions
Apply to (কারো কাছে আবেদন করা): He applied to the principal for free admission.
Ascend from (উপরে ওঠা): Rahim watched the mist ascending from the valley.
Behave towards(ব্যবহার করা): The students behaved objectionably towards the Head teacher.
Burst into(কান্নায় ভেঙ্গে পড়া): He burst into tears.
Hinge on/upon (নির্ভর করা): The whole matter hinges upon this clue.
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Idioms
Bear in mind (remember— মনে রাখা —V): You should also bear in mind the additional costs of the mortgage.
Pros and cons (খুঁটিনাটি): You should consider the pros and cons of the system.
Pick a quarrel (ঝগড়া করা)—Do not pick a quarrel.
Silver living (hope- আশা বা ভালো দিক): Every cloud has a silver lining.
Through thick and thin (through all difficulties, সমস্ত সমস্যার মধ্যে)-Ruma followed her husband through thick and thin.