On the spot : অকুস্থলেই; সঙ্গে সঙ্গে; হাতে-হাতে; ততক্ষণাত; সতর্কভাবে; প্রস্তুতভাবে; সঙ্কটাপন্ন;
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Appropriate Prepositions
Composed of(তৈরী): This medicine is composed of vitamins and minerals.
Eager for, about (একাগ্র): The students for this school are eager for knowledge. The teacher is eager about the success of his students.
Hit upon (পরিকল্পনা নেয়া): Rahim hit upon a new plan.
Run into (জড়িয়ে পড়া): He had run into debt.
Sorry for (দুঃখিত): He is sorry for his misdeeds.
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Idioms
At a standstill (নিশ্চল, অচলাবস্থায়-adj.) The discussion is now at a standstill.
Lose heart (হতাশ হওয়া) — Do not lose heart in danger.
Man of straw (অপদার্থ): We do not care for a man of straw like you.
To the brim (কানায় কানায়) - The river was full to the brim.
Wild goose chase (useless pursuit, পন্ডশ্রম) —Do not waste time in wild goose chase.