Exordium : ভূমিকা; গ্রন্থাদির ভূমিকা;
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Appropriate Prepositions
Angry with(কারো সাথে ক্রুদ্ধ হওয়া): The teacher was very angry with the students.
Attention to(মনোযোগ): He has no attention to his studies.
Dull at (অপ্টু/কাঁচা): He is dull at mathematics.
Good for, at (ভাল): This man is good for nothing. He is good at English.
Monument to (স্মৃতিসৌধ): The monument to your right is a popular tourist attraction.
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Idioms
At a round rate (at the fixed price – নির্ধারিত মূল্যে) Things are selling in the shop at a round rate.
From hand to mouth (দিন আনে দিন খায়): The poor man live from hand to mouth.
Hue and cry (শোরগোল): The villagers raised a hue and cry to see the thief.
In one’s teens (তের থেকে উনিশ বছর বয়সের মাঝে): She is yet in her teens.
Read between the lines (understand the significance, অন্তনিহিত অর্থ বুঝা) Try to read between the lines of the letter.