Alertness : সতর্কতা;
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Appropriate Prepositions
Answerable to (কারো কাছে জবাবদিহিতা করা): He is not answerable to anybody for his mistake.
Appear at/in(উপস্থিত হওয়া): I should appear at/in the exam hall in time.
Arrange for(ব্যবস্থা করা): We have arranged everything for our study tour.
Bark at(ঘেউ ঘেউ করা): The dog is barking at the strange woman.
Indebted to (ঋণী থাকা): We are indebted to the great leaders of the country for their service.
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Idioms
At liberty (free-মুক্ত-adj.) They are at liberty to go anywhere.
Backstairs influence (secret and illegal influence- গোপন এবং বে আইনী প্রভাব-n) He did not deseve the job, however, he got it by backstairs influence.
Fair play (প্রতারণা বিহীন নীতি বা কাজ): I believe in the practice of fair play in my business.
Far and wide (সর্বত্র): His fame spread far and wide.
Out of temper (ক্রুদ্ধ): The teacher is out temper to see the overall results.