Head assistant : প্রধান সহকারী;
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Appropriate Prepositions
Certain of(নিশ্চিত): Jamal is certain of his success.
Complain about (কোনো বিষয়ে নালিশ করা): They complained about the mismanagement of the programme.
Eager for, about (একাগ্র): The students for this school are eager for knowledge. The teacher is eager about the success of his students.
Good for, at (ভাল): This man is good for nothing. He is good at English.
Hanker after (আকাঙ্ক্ষা/লোভ করা): He hankers after riches.
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Idioms
All along - (সব সময়): I was present in the meeting all along.
At home (proficient in — দক্ষ) The students of Bangladesh should be at home in Bangla.
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.
Safe and sound (নিরাপদে)— He reached home safe and sound.
Tooth and nail (strongly, প্রবলভাবে)-He fought tooth and nail against his enemy.