Extemporaneous : অনিয়মিত; তত্ক্ষণিক; পূর্বপ্রস্তুতিহীন; অচিন্তিতপূর্ব; আকস্মিক; আপতিক; দৈবাৎ;
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Appropriate Prepositions
Absorbed in(মগ্ন): I am absorbed in my study.
Argue against (বিপক্ষে বলা): She argued against the bill.
Aware of(অবগত): I am not aware of his dishonesty.
Cope with(সামলানো বা পেরে উঠা): They cannot cope with the situation.
Decide upon (সিদ্ধান্ত করা): We have not yet decided whether we are going to picnic.
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Idioms
Milk and honey – (প্রাচুর্য)- He lives with milk and honey.
Take one to task (rebuke, তিরস্কার করা)— He took me to task for negligence of duty.
Tide over (বিপদ অতিক্রম করা-overcome ): The manager tided over the situation.
Weal and woe (সুখ-দুঃখ): Human life is full of weal and woe.
Worthy of (যোগ্য) - He is worthy of a good job.