Air shaft : খনি মধ্যে বাতাস ঢোকানর জন্য পথ;
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Appropriate Prepositions
Arrange for(ব্যবস্থা করা): We have arranged everything for our study tour.
Associate with, in(জড়িত হওয়া): This man was associated with crime.
Attacked by(আক্রান্ত ব্যক্তিবাচক): He has been attacked by a gang of robbers.
Aware of(অবগত): I am not aware of his dishonesty.
Devoid of (বিহীন/বর্জিত): He is devoid of common sense.
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Idioms
At death’s door (at the point of death- মৃত্যুর দ্বারে) The patient is now at death’s door.
Back and forth (to and fro-এদিক ওদিক – adv.) The mad man was walking back and forth in the doctor’s chamber.
Soft Soap (নিজ অভিপ্রায়ে/অভিসন্ধিতে তোষামোদ করা): He was expert in soft soap.
Through and through (পুঙ্খানুপুঙ্খু রুপে)- He read the poem through and through.
Take to one's heels (to run away, পালানো)- They took to their heels when they saw the policeman approaching.