Once upon a time : এককালে; একদা; পূর্বে কোন একসময়ে;
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Appropriate Prepositions
Break in (কথার মাঝে কথা বলা): As she was talking, he suddenly broke in, saying, ‘that’s a rat!’
Burst into(কান্নায় ভেঙ্গে পড়া): He burst into tears.
Independent of (স্বাধীন): They are independent of my health.
Indispensable to (অত্যাবশ্যকীয়): Your help is indispensable to him.
Object to (আপত্তি করা): He objected to my proposal.
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Idioms
Breathe one’s last (decease, die- শেষ নিঃশেষ ত্যাগ করা, মরে যাওয়া) The man breathed his last in his native village.
Dead of night (মধ্যরাত্রি): The robbers broke into the house at dead of night.
Fair play (প্রতারণা বিহীন নীতি বা কাজ): I believe in the practice of fair play in my business.
Irony of fate (ভাগ্যের পরিহাস): He could not succeed by irony of fate.
Round the clock (সমস্ত দিন): He is working round the clock.