For many days : কতদিন;
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Appropriate Prepositions
Concerned with(জড়িত): She was concerned with such things.
Consolidate for (শক্তিশালী করা): The four new companies consolidated for greater efficiency.
Heir to (উত্তরাধিকার পাওয়া): He is an heir to a vast property.
Road to (উপায়/ রাস্তা): There is no easy road to learning.
Urge upon (আহবান জানানো): She urged upon his son the importance of being honest.
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Idioms
At the latest (খুব বেশি দেরী হলে) He will arrive here at 5 p. m. at the latest.
In black and white – (লিখিতভাবে) – Put forward your proposal in black and white.
Lose heart (হতাশ হওয়া) — Do not lose heart in danger.
Set free (মুক্ত করা): The prisoners were set free.
Ups and downs (উত্থান পতন): There are ups and downs in a man’s life.