Optimistically : আশাবাদী হওয়া;
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Appropriate Prepositions
Adapt to(খাপ খাওয়ানো): Everybody must adopt himself to new environment.
Certain of(নিশ্চিত): Jamal is certain of his success.
Deaf to, of, in (না শোনা, বধির হওয়া): The boy is deaf to his father’s advice. This man is deaf of/in one ear.
Due to (কারণে): His absence is due to illness.
Taste for (রুচি; পছন্দ): He has a great taste for music.
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Idioms
Back and forth (এদিক ওদিক) The mad man was running back and forth in the hospital.
Far and wide (সর্বত্র): His fame spread far and wide.
Gift of the gab (বাকপটুতা): An advocate should have the gift of the gab.
Ins and out (খুঁটিনাটি): I know ins and outs of this file.
Pave the way (সুপ্রসন্ন করা) – I am sure I can pave the way for your success.