Keratin : শিং, নখ, চুল ইঃ গঠনকারী প্রোটিন;
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Appropriate Prepositions
Annoyed for(কোনো কারনে বিরক্ত হওয়া): The officer was annoyed with the clerk for being late.
Ascend to (আরোহণ করা): karim began to ascend to the surface of wakefulness.
Descend on (আক্রমণ করা): Armed thieves descended on the helpless girl.
Devoid of (বিহীন/বর্জিত): He is devoid of common sense.
Enter into (কোনো কিছুতে আবদ্ধ হওয়া): pma entered into a new agreement.
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Idioms
A bed of roses - (সুখকর অবস্থা): Life is not a bed of roses.
At every step (প্রতি পদে পদে): There are dangers at every step in our life and yet we want to live.
Brown study (দিবাস্বপ্ন): The girl is absorbed in a brown study.
To the point (সঠিক) - The boy answered the question to the point.
Ups and downs (উত্থান পতন): There are ups and downs in a man’s life.