Vigilance : সতর্কতা; সতর্ক প্রহরা;
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Appropriate Prepositions
Call on(কারও সাথে দেখা করা): I called on him in his office.
Careful of(যত্নশীল থাকা): Sadia is careful of her health.
Married to (বিবাহিত): Salma was married to a Govt. Officer.
Noted for (বিখ্যাত): She is noted for dancing.
Rid of (মুক্তি দেওয়া): He will get rid of troubles soon.
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Idioms
At a round rate (at the fixed price – নির্ধারিত মূল্যে) Things are selling in the shop at a round rate.
Call in question (সন্দেহ করা): No one can call his honesty in question.
Die in harness (কর্মরত অবস্থায় মারা যাওয়া): Dr. Sen died in harness.
See to (বিবেচনা করা)— Can you see to it that everyone gets a copy of this memo?
With a view to (উদ্দেশ্য)- He goes to college with a view to attending the class.