Oxygen mask : অক্সিজেন মাস্ক; অক্সিজেন-মুখোশ;
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Appropriate Prepositions
Adapt for (উপযোগী করে নেওয়া): This book has been adapted for the children.
Aware of(অবগত): I am not aware of his dishonesty.
Comply with(মেনে নেওয়া): The clerks must comply with the orders of their officer.
Guess at (অনুমান করা): It is difficult to guess at the age of women.
Taste for (রুচি; পছন্দ): He has a great taste for music.
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Idioms
At all (in the least degree – মোটেও না) There is no water at all in the pond.
Die in harness (কর্মরত অবস্থায় মারা যাওয়া): Dr. Sen died in harness.
Fight shy of (এড়িয়ে যাওয়া): Honest boys always fight shy of bad and dishonest friends.
Give in (বশ্যতা স্বীকার করা): We will never give in to our enemies.
Weal and woe (joy and sorrow, সুখ দঃখ) —Human life is full of weal and woe.