A hard nut to crack : কঠিন সমস্যা; যে লোককে সহজে টলানো যায় না;
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Appropriate Prepositions
Competent for(যোগ্য): He is not competent for the post.
Die of, for, from (মারা যাওয়া): He died of cholera. He died for his country. He died from an injury.
Hatred for (ঘৃণা): I have no hatred for anyone.
Pity for (করুণা, সমব্যথা): I feel pity for this helpless old man.
Recover from (সুস্থ হওয়া; পূর্ব অবস্থায় ফিরে আসা): The patient has not yet recovered from his severe illness.
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Idioms
At one’s elbow (near at hand — হাতের কাছে – adv.) His private secretary is always at his elbow.
Fair and square (সৎ): The learned persons should be fair and square.
To play on a fiddle (অনর্থক সময় নষ্ট করা - To waste time)-He played on a fiddle by nature.
Take to one's heels (to run away, পালানো)- They took to their heels when they saw the policeman approaching.
Three R's (প্রাথমিক শিক্ষা)— He has not yet learnt the three R's.