First hand : সরাসরি; হাতে-কলমে;
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Appropriate Prepositions
Adorn with(সাজানো/সজ্জিত করা): Adorn the car with flowers.
Defend against (রক্ষা করা): We will defend our country against all enemies.
Lost in (মগ্ন): Simon is lost in meditation.
Married to (বিবাহিত): Salma was married to a Govt. Officer.
Play on (বাজানো): They play on the piano.
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Idioms
At the eleventh hour (at the last moment-শেষ মুহুর্তে adv.) The patient was in a dangerous condition and the doctor came at the eleventh hour.
Do yeoman’s service (বিশেষ উপকার করা): Freedom fighters have done yeoman’s service for country.
Red letter day (স্মরণীয় দিন): The 16th December is a red letter day for us.
Run into debt (ঋণগ্রস্ত হওয়া)— He ran into debt.
To and fro (hither and thither, এদিক ওদিক)-The man is walking to and fro.