Refractive index : প্রতিসরাঙ্ক;
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Appropriate Prepositions
Appoint to(নিযুক্ত করা/হওয়া): Kibria has been appointed to the post of Headmaster.
Attend to(মনোযোগ দেওয়া): Please attend to my advice.
Good for, at (ভাল): This man is good for nothing. He is good at English.
Look over (পরীক্ষা করা): He was looking over the answer scripts.
Quarrel over (কোন বিষয়ে ঝগড়া করা): Do not quarrel over this trifling matter, let it be drop.
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Idioms
All in - (পরিশ্রান্ত): I was all in after the meeting.
Do yeoman’s service (বিশেষ উপকার করা): Freedom fighters have done yeoman’s service for country.
To play on a fiddle (অনর্থক সময় নষ্ট করা - To waste time)-He played on a fiddle by nature.
Steer clear of (avoid, দূরে থাকা)— You must steer clear of evil company.
Soft Soap (নিজ অভিপ্রায়ে/অভিসন্ধিতে তোষামোদ করা): He was expert in soft soap.