On the alert : বিপদের বা আক্রমণের জন্য প্রস্তুত; সতর্ক ত্ত তত্পর অবস্থায়;
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Appropriate Prepositions
Decide upon (সিদ্ধান্ত করা): We have not yet decided whether we are going to picnic.
Despair of (নিরাশ হওয়া): Do not despair of further improvement.
Heir to (উত্তরাধিকার পাওয়া): He is an heir to a vast property.
Remedy for (প্রতিকার): There is no remedy for his misbehavior.
Sentence to, for (দন্ডাদেশ দেওয়া): He was sentenced to death for murder.
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Idioms
At a discount (অনাদৃত) Female education is no longer at a discount now.
At the top of (শীর্ষে): The boy shouted at the top of his voice.
As a rule (নিয়ম অনুসারে.) As a rule, she kept silent in the meeting.
On the whole (মোটের ওপর): On the whole, his conduct is good.
Riding for a fall (বেপরোয়াভাবে কাজ করা- to act recklessly): He rides for a fall in the election.