For many days : কতদিন;
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Appropriate Prepositions
Assent to(সম্মতি দেওয়া): The President has assented to the bill.
Authority over (কর্তৃত্ব, আধিপত্য): She has no authority over his growing daughters.
Close to(নিকটে): Our College is close to the Post Office.
Consolidate for (শক্তিশালী করা): The four new companies consolidated for greater efficiency.
Dwell in (বাস করা): He dwells in a tall apartment.
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Idioms
Kith and kin (নিকট আত্মীয়): He has no relation with his kith and kin.
Lame excuse (বাজে ওজর): The lame excuse will not do.
Out of sorts (সামান্য অসুস্থ): The baby is out of sorts after playing.
To the backbone (হাড়ে হাড়ে): I know this boy to the backbone.
Up and doing (উদ্যোগী): Be up and doing and then you will succeed in your life.