Bolt from the blue : বিনা মেঘে বজ্রাঘাত; সম্পূর্ণ অপ্রত্যাশিত জিনিস;
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Appropriate Prepositions
Acquit of (অব্যাহতি দেয়া): The chief justice acquitted him of the charge of murder.
Contemporary of (সমসাময়িক): William Wordsworth was a contemporary for greater efficiency.
Contrary to(বিপরীত, পরিপন্থী): Students should not act contrary to the rules of discipline.
Play on (বাজানো): They play on the piano.
Stick to (দৃঢ়ভাবে লেগে থাকা): We should always stick to our decisions.
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Idioms
All along - (সব সময়): I was present in the meeting all along.
Bad bargain (purchasing at a high price-বেশি দামে কেনা-n) You had a bad bargain of the watch I see.
In one’s teens (তের থেকে উনিশ বছর বয়সের মাঝে): She is yet in her teens.
Pick a quarrel (ঝগড়া করা)—Do not pick a quarrel.
Safe and sound (নিরাপদে)— He reached home safe and sound.