Gold standard : স্বর্ণমান;
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Appropriate Prepositions
Addicted to(খারাপ কিছুতে আসক্ত): She is addicted to collecting stamps.
Competent for(যোগ্য): He is not competent for the post.
Desire for (আকাঙ্ক্ষা করা): He has no desire for money.
Dull at (অপ্টু/কাঁচা): He is dull at mathematics.
Free from (মুক্ত): He is now free from danger.
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Idioms
At ease (in peace or pleasure – শান্তিতে বা আরামে) A man who has enemies can not live at ease.
Fall flat (ফলপ্রসূ না হওয়া): This business is going to fall flat.
In no time (শীঘ্র): He will finish the work in no time.
Slip of the tongue (বলায় সামান্য ভুল): This is a slip of the tongue; don’t pay much stress on it.
Turn over a new leaf (begin a new phase of life, নবজীবন শুরু করা) —After his failure he turned over a new leaf.