Commanding officer : অধিনায়ক অফিসার;
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Appropriate Prepositions
Agree with(ব্যক্তির সাথে একমত হওয়া): I agree with you.
Argue against (বিপক্ষে বলা): She argued against the bill.
Count for(গণ্য বা বিবেচিত হওয়া): There can be no lasting peace without true democracy in which the people play a part and count for something.
Look for (খোঁজা): I was looking for the lost phone.
Remind of (স্মরণ করিয়ে দেওয়া): He reminded me of his request to lend him some money.
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Idioms
Bring to light (disclose-প্রকাশ করা) The police brought the secret to light.
Bear in mind (remember— মনে রাখা —V): You should also bear in mind the additional costs of the mortgage.
Upper hand (প্রাধান্য) - He got the upper hand in the selection.
Without fail (অবশ্যই) - You must attend the meeting without fail.
Well-to-do (সঙ্গতিপূর্ণ) - He was not born in a well-to-do family.