Unthankfulness : কৃতঘ্নতা;
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Appropriate Prepositions
Attentive to(মনোযোগী): He is attentive to his business.
Based on(প্রতিষ্ঠিত, ভিত্তিক): His information is not based on the correct information.
Break in (কথার মাঝে কথা বলা): As she was talking, he suddenly broke in, saying, ‘that’s a rat!’
Consolidate for (শক্তিশালী করা): The four new companies consolidated for greater efficiency.
Die of, for, from (মারা যাওয়া): He died of cholera. He died for his country. He died from an injury.
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Idioms
Look into something (তদন্ত করা- investigate) - The manager looked into the matter.
Run short (কমতি পড়া) —I ran short of money.
Take into account (বিবেচনা করা): Your activities should be taken into account.
Up to (পর্যন্ত) - I have done the exercises up to page 40.
Widow’s mite (দরিদ্রের ক্ষুদ্র দান): A windows mite is no less important than a large contribution of a rich man.