Keep abreast of : পাশাপাশি থাকা অর্থাৎ পিছাইয়া না পড়া;
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Appropriate Prepositions
Bad at (অদক্ষ): He is not bad at English.
Consent to(মত দেওয়া): The Prime Minister consented to the proposal.
Detrimental to (অপকারী): Smoking is detrimental to health.
Faith in (বিশ্বাস): I have no faith in him.
Shocked at (মানসিক আঘাতপ্রাপ্ত): Snigdha was terribly shocked at the death of Ratul.
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Idioms
At home (comfortable— আরাম) He feels at home in Dhaka now.
At one’s elbow (near at hand — হাতের কাছে – adv.) His private secretary is always at his elbow.
Fall flat (ফলপ্রসূ না হওয়া): This business is going to fall flat.
Laughing stock (হাসির পাত্র)— He is a laughing stock to all.
Out of sorts (সামান্য অসুস্থ): The baby is out of sorts after playing.