At what time : কখন;
Related Words
at a time  at home  at that time  at what time  ata time  See Words Also In
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Appropriate Prepositions
Addicted to(খারাপ কিছুতে আসক্ত): She is addicted to collecting stamps.
Attentive to(মনোযোগী): He is attentive to his business.
Concerned for (উদ্বিগ্ন): The parents are concerned for their growing children.
Object to (প্রতিবাদ করা): Many people objected to the remarks of the leader.
Road to (উপায়/ রাস্তা): There is no easy road to learning.
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Idioms
At one’s elbow (near at hand — হাতের কাছে – adv.) His private secretary is always at his elbow.
As ill-luck would have it (unfortunately- দুর্ভাগ্যবশত) A child was born to them but, as ill-luck would have it, it died when it was eight days old.
Brown study (day dream-দিবাস্বপ্ন -n) The woman is absorbed in a brown study.
Run into debt (ঋণগ্রস্ত হওয়া)— He ran into debt.
Set something right (ঠিক করা)— He will set the machine right.