In the picture : যথাযথরূপে অবগত বা বিদিত;
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Appropriate Prepositions
Zeal for (উৎসাহ): Forhad has great zeal for cricket.
Attain to (লাভ করা): He will not attain to his objective so soon.
Certain of(নিশ্চিত): Jamal is certain of his success.
Cope with (এঁটে ওঠা; তাল মিলিয়ে চলা): They cannot cope with so much work.
Short of (অপর্যাপ্ত): I am running short of money.
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Idioms
Laughing stock (হাসির পাত্র)— He is a laughing stock to all.
Milk and honey – (প্রাচুর্য)- He lives with milk and honey.
Slip of the tongue (বলায় সামান্য ভুল): This is a slip of the tongue; don’t pay much stress on it.
Take to heart (মর্মাহত হওয়া)- He really took it to heart when I asked him to reconsider.
White elephant (অত্যন্ত ব্যয়সাপেক্ষ বিলাসিতা): At last the department proved to be a white elephant.