Mercilessly : ক্ষমাহীনভাবে;
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Appropriate Prepositions
Call on(কারও সাথে দেখা করা): I called on him in his office.
Depend on (নির্ভর করা): Presently, the students depend on/upon guide books.
Easy of (সরল): The teacher is easy of approach.
Lost in (মগ্ন): Simon is lost in meditation.
Stare at (চাওয়া বা তাকানো): He stares at me.
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Idioms
At ease (in peace or pleasure – শান্তিতে বা আরামে) A man who has enemies can not live at ease.
Fight shy of (এড়িয়ে যাওয়া): Honest boys always fight shy of bad and dishonest friends.
Let loose (বল্গাহীনভাবে ছেড়ে দেয়া): He let his horse loose in the field.
Safe and sound (নিরাপদে)— He reached home safe and sound.
Up to (পর্যন্ত) - I have done the exercises up to page 40.