Upgrade : পদোন্নতি ঘটানো; মেশিন ইত্যাদির উন্নতি ঘটানো;
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Appropriate Prepositions
Count on/upon (নির্ভর, বিশ্বাস করা): Rahim count on (upon) my help.
Covetous of(লোভী হওয়া): He is covetous of wealth.
Devoid of (বিহীন/বর্জিত): He is devoid of common sense.
Repent of (অনুতাপ করা): I repented of my past.
Work for (কারো জন্য কাজ করা): She works for a construction company.
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Idioms
At the eleventh hour (at the last moment-শেষ মুহুর্তে adv.) The patient was in a dangerous condition and the doctor came at the eleventh hour.
As a rule (নিয়ম অনুসারে.) As a rule, she kept silent in the meeting.
Fish in a troubled water (এলোমেলো অবস্থার সুযোগ নেয়া): He made a lot of money by fishing in a troubled water.
Moot point (অমীমাংসিত বিষয়): Dowry system is still a moot point in Bangladesh.
Short cut (সংক্ষিপ্ত পথ)— He comes by this shortcut.