Alertness : সতর্কতা;
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Appropriate Prepositions
Based on(প্রতিষ্ঠিত, ভিত্তিক): His information is not based on the correct information.
Descend on (আক্রমণ করা): Armed thieves descended on the helpless girl.
Devoid of (বিহীন/বর্জিত): He is devoid of common sense.
Take pity on (দয়া করা): Take pity on the helpless people.
Wish for (প্রত্যাশা করা): Everybody wish for happiness.
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Idioms
Be all and end all (the ultimate out come- চরম পরিণতি—n) A loss of one million taka was the be all and end all of the projects.
Liable to mislead (প্রতারণাপূর্ণ- deceptive): Appearances can often be liable to mislead.
Laughing stock (হাসির পাত্র)— He is a laughing stock to all.
Riding for a fall (বেপরোয়াভাবে কাজ করা- to act recklessly): He rides for a fall in the election.
Well off (স্বচ্ছল) - Jim and Della were not well off.