First hand knowledge : মৌল জ্ঞন;
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Appropriate Prepositions
Absent from(অনুপস্থিত থাকা): I was absent from the class yesterday.
Careful of(যত্নশীল থাকা): Sadia is careful of her health.
Consolidate for (শক্তিশালী করা): The four new companies consolidated for greater efficiency.
Convince of(বিশ্বাস হওয়া): I am convinced of your efficiency.
Greed for (লোভ): He has an indomitable greed for wealth.
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Idioms
Cock and bull story (আষাঢ়ে গল্প): You must be ashamed of your cock and bull story.
Fight shy of (এড়িয়ে যাওয়া): Honest boys always fight shy of bad and dishonest friends.
Head and ears (সম্পূর্ণরূপে): He is over head and ears in debt.
Out of order (বিকল): The elevator was out of order.
Pin money (স্ত্রীর দেয়া হাত খরচ)— She saved her pin money.