Alertness : সতর্কতা;
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Appropriate Prepositions
Assure of(আশ্বাস দেওয়া): I can assure you of the Principal’s honesty.
Bound for(প্রস্তুত থাকা): Although we can see that it is bound for failure, it is fascinating to follow its journey.
Independent of (স্বাধীন): They are independent of my health.
Sick of (ক্লান্ত): He is sick of this idle life.
Welcome to (স্বাগত জানানো): You are welcome to our new office.
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Idioms
At least (in the lowest estimate- কমপক্ষে) He is the owner of thirty lakh taka at least.
At dead of night (গভীর রাতে) The police caught the thief at dead of night.
Out of date (সেকেলে): This fashion is out of date.
To play on a fiddle (অনর্থক সময় নষ্ট করা - To waste time)-He played on a fiddle by nature.
Well up (সুপন্ডিত)- Dr. Shahidullah was well-up in Bengali language.