Mental arithmetic : মানসাঙ্ক;
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Appropriate Prepositions
Appoint to(নিযুক্ত করা/হওয়া): Kibria has been appointed to the post of Headmaster.
Bare of(অনাবৃত, স্বল্প-সজ্জা): The trees of the forest are bare of leaves.
Feed on (খেয়ে বাঁচা): The cow feeds on grass.
Genius for (দক্ষতা): Nazrul had a genius for convincing girls.
Inquire of, about, into, after (অনুসন্ধান করা): Roma inquired of me about my father’s health. The pope will inquire into the cause of fire. Mehjabin inquired after her friends.
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Idioms
At death’s door (at the point of death- মৃত্যুর দ্বারে) The patient is now at death’s door.
In full swing (পুরোদমে): The school is in full swing after the vacation.
In vogue (চালু): This custom is not in vogue at present.
On the contrary (বিপরীত পক্ষে): I do not hate him; on the contrary I love him.
To go to the dogs (গোল্লায় যাওয়া)- He has gone to the dogs by keeping evil company.