Demonstrator : যব্যবহার প্রদর্শক, প্রতি পাদক
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Appropriate Prepositions
Ascend to (আরোহণ করা): karim began to ascend to the surface of wakefulness.
Feed on (খেয়ে বাঁচা): The cow feeds on grass.
Indispensable to (অত্যাবশ্যকীয়): Your help is indispensable to him.
Monument to (স্মৃতিসৌধ): The monument to your right is a popular tourist attraction.
Repent of (অনুতাপ করা): I repented of my past.
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Idioms
At all (in the least degree – মোটেও না) There is no water at all in the pond.
Back and bally (জীবিকা, ভরণ পোষণ—n) Who will provide the increasing population with the required back and bally?
Dead against (তীব্র বিরোধী - strongly opposed to): I am dead against corruption.
In full swing (পুরোদমে): The school is in full swing after the vacation.
Now and then (মাঝে মাঝে): He comes here now and then.