Opening ceremony : উদ্বোধন অনুষ্ঠান;
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Appropriate Prepositions
Arrive at(উপস্থিত হওয়া, পৌছানো): The train arrived at Dhaka station on time.
Attention to(মনোযোগ): He has no attention to his studies.
Fantasize about (কল্পনা করা): They fantasized about winning the lottery.
Fond of (প্রিয়/অনুরাগী): Children are fond of sweets.
Relevant to (প্রাসঙ্গিক): Your answer is not exactly relevant to my question.
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Idioms
Acid test (অগ্নি পরীক্ষা): You must succeed in the acid test of the time you live in.45
All along - (সব সময়): I was present in the meeting all along.
Bad names (গালমন্দ—n) He called the man bad names.
Slip of the pen (লেখায় অসতর্কতাবশত সামান্য ভুল): The mistake is due to a slip of the pen.
To the letter (in all details, অক্ষরে অক্ষরে) —Follow my advice to the letter.