Sympathetic ink : অদৃশ্য কালি;
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Appropriate Prepositions
Apply to (কারো কাছে আবেদন করা): He applied to the principal for free admission.
At lunch (দুপুরের খাবারে): They were talking so much at lunch that their food went cold.
Charge with(অভিযুক্ত করা): He is charged with killing.
Dressed in (সজ্জিত, পরিহিত): The girl was dressed in silk.
Quarrel with (ঝগড়া করা): Some girls quarreled with one another.
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Idioms
Back and forth (এদিক ওদিক) The mad man was running back and forth in the hospital.
Gift of the gab (বাকপটুতা): An advocate should have the gift of the gab.
Give one’s right arm (বিপদের ঝুকি নেয়া): I will give my right arm if I could manage the tickets.
Maiden speech (প্রথম বক্তৃতা): His maiden speech fell flat on the audience.
Short temper (রগচটা)— He is a man of short temper.