"I was reading the dictionary. I thought
it was a poem about everything."
                     --Steven Wright

Appropriate Preposition:

  • Key to ( সমাধানের উপায় ) He has found out the key to his problem.
  • Useful for ( প্রয়োজনীয় (উদ্দেশ্য) ) This book is useful to us for examination.
  • Persist in ( লেগে থাকা ) He persisted in disturbing me.
  • Aloof from ( দূরে থাকা ) Keep yourself aloof from bad company.
  • Involved in ( জড়িত ) He is involved in the plot.
  • Tide over ( অতিক্রম করা ) He will soon tide over the difficulty.

Idioms:

  • when pigs fly ( কখনও না ) I will help you when pigs fly
  • the exact point ( কাঁটায়-কাঁটায় )
  • Out of the wood ( বিপদমুক্ত ) He is not yet out of the wood.
  • by dint of ( ফলে (সাধারণত বল প্রয়োগের ফলে) )
  • At bay ( কোনঠাসা ) The tiger was at bay in the bush.
  • At a stretch ( একটানা ) He can run ten miles at a stretch.