Non-returnable : অ-ফেরতযোগ্য; অপ্রত্যর্পণীয়;
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Appropriate Prepositions
Adapt to(খাপ খাওয়ানো): Everybody must adopt himself to new environment.
Addicted to(খারাপ কিছুতে আসক্ত): She is addicted to collecting stamps.
Affection for(স্নেহ): She has a great affection for the child.
Die for (আত্নত্যাগ করা): Our Chairman died for our country.
Qualified for (যোগ্য প্রতিপন্ন হওয়া): No candidate was properly qualified for the post.
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Idioms
Get rid of (মুক্তি পাওয়া): Try to get rid of the rogue.
Lion’s share (বড় মাপের অংশ): He took the lion’s share of the profit.
Pack of lies (ডাঁহা মিথ্যা)—He told pack of lies to prove himself innocent.
Run a risk (ঝুকি নেয়া) — He ran a risk to save his life.
To the point (সঠিক) - The boy answered the question to the point.