Fidelity guarantee : সততার জামিন;
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Appropriate Prepositions
Capable of(সক্ষম): He is capable of doing it.
Consent to(মত দেওয়া): My father did not consent to the proposal of my sister’s marriage.
Count on/upon (নির্ভর, বিশ্বাস করা): Rahim count on (upon) my help.
Repentance for (অনুতাপ): He has repentance for the past.
Senior to (বয়সে বড়): He is senior to me by two years.
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Idioms
Far and wide (সর্বত্র): His fame spread far and wide.
Moot point (অমীমাংসিত বিষয়): Dowry system is still a moot point in Bangladesh.
Read between the lines (understand the significance, অন্তনিহিত অর্থ বুঝা) Try to read between the lines of the letter.
Run a risk (ঝুকি নেয়া) — He ran a risk to save his life.
Yellow dog (হীন ব্যক্তি) - A yellow dog is always hated by all.