System of forces : বলশ্রেণি;
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Appropriate Prepositions
Annoyed with(ব্যক্তির সাথে বিরক্ত হওয়া): I am annoyed with him.
Creep up (বৃদ্ধি পাওয়া): The prices of are creeping up day by day.
Detrimental to (অপকারী): Smoking is detrimental to health.
Famous for (বিখ্যাত): Smith is famous for his wisdom.
Point out (চিহ্নিত করা): Point out the mistakes from the book.
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Idioms
Back and bally (জীবিকা, ভরণ পোষণ—n) Who will provide the increasing population with the required back and bally?
In full swing (পুরোদমে): The school is in full swing after the vacation.
In no time (শীঘ্র): He will finish the work in no time.
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.