Extemporise : পূর্বপ্রস্তুতি ব্যতীত বলা বা বক্তৃতা করা;
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Appropriate Prepositions
Apply to (কারো কাছে আবেদন করা): He applied to the principal for free admission.
Careless of(অসতর্ক): Do not be careless of your health.
Certain of(নিশ্চিত): Jamal is certain of his success.
Free from (মুক্ত): He is now free from danger.
Stare at (চাওয়া বা তাকানো): He stares at me.
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Idioms
Follow the footsteps of (পায়ে পায়ে অনুসরণ করা): People always follow the footsteps of some great man.
In a fix (মুশকিলে পতিত হওয়া): The man is in a fix with his new hairstyle.
Under age (অপ্রাপ্ত বয়স্ক)- He could not cast his vote because he was under age.
Ups and downs (উত্থান পতন)- There is ups and downs in a man's life.
Wild goose chase (useless pursuit, পন্ডশ্রম) —Do not waste time in wild goose chase.