Crash helmets : শিরস্ত্রাণ;
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Appropriate Prepositions
Bar to(বাধা): Poverty is not a bar to happiness.
Concern with (জড়িত থাকা): Asif is not concerned with this conspiracy.
Concerned for (উদ্বিগ্ন): The parents are concerned for their growing children.
Famous for (বিখ্যাত): Smith is famous for his wisdom.
Inquire of, about, into, after (অনুসন্ধান করা): Roma inquired of me about my father’s health. The pope will inquire into the cause of fire. Mehjabin inquired after her friends.
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Idioms
After all - (সব কথার পরেও): I rang and told her I couldn't come after all.
Lose heart (হতাশ হওয়া) — Do not lose heart in danger.
Milk and honey – (প্রাচুর্য)- He lives with milk and honey.
Three R's (প্রাথমিক শিক্ষা)— He has not yet learnt the three R's.
Up and doing (উদ্যোগী): Be up and doing and then you will succeed in your life.