On the spot : অকুস্থলেই; সঙ্গে সঙ্গে; হাতে-হাতে; ততক্ষণাত; সতর্কভাবে; প্রস্তুতভাবে; সঙ্কটাপন্ন;
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Appropriate Prepositions
Adjacent to(সংলগ্ন): The Post Office is adjacent to my house.
Answerable to (কারো কাছে জবাবদিহিতা করা): He is not answerable to anybody for his mistake.
Loyal to (অনুগত): Every citizen must be loyal to the state.
Run on (বিরতিহীন চলা): The bus is running on time.
Stick to (দৃঢ়ভাবে লেগে থাকা): We should always stick to our decisions.
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Idioms
At every step (প্রতি পদে পদে): There are dangers at every step in our life and yet we want to live.
Be all and end all (the ultimate out come- চরম পরিণতি—n) A loss of one million taka was the be all and end all of the projects.
Seventh heaven – (মহাখুশী) – I was in the seventh heaven when I heard the news of my BCS final result.
To the point (সঠিক) - The boy answered the question to the point.
With the sweat of one’s brow (মাথার ঘাম পায়ে ফেলে) — He earns his livelihood with the sweat of his brow.