Oligocene : নবজীবীয় স্তর;
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Appropriate Prepositions
Abide by(মেনে চলা): We must abide by the rules of discipline.
Bare of(অনাবৃত, স্বল্প-সজ্জা): The trees of the forest are bare of leaves.
Charge with(অভিযুক্ত করা): He is charged with killing.
Desire for (কামনা): He has no desire for fame.
Relation with (সম্পর্ক): I have no relation with the culprit.
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Idioms
Die in harness (কর্মরত অবস্থায় মারা যাওয়া): Dr. Sen died in harness.
Easy and free (অমায়িক): The boy is easy and free, so he has many friends.
Square meal (পেট ভরা আহার): He is too poor to have a square meal everyday.
Short temper (রগচটা)— He is a man of short temper.
With might and main (যথা শক্তি দিয়ে) —He tried with might and main to help me.