Investigator : অন্বেষী; তদন্ত কারক; অবেক্ষক;
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Appropriate Prepositions
Astonished at(বিস্ময়-বিহবল হওয়া): We were astonished at his unexpected success.
Careless of(অসতর্ক): Do not be careless of your health.
Certain of(নিশ্চিত): Jamal is certain of his success.
Make from (কোনো উপকরণ দ্বারা সরাসরি তৈরী নয় বোঝাতে): Paper is made from bamboo.
Play on (বাজানো): They play on the piano.
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Idioms
At ease (in peace or pleasure – শান্তিতে বা আরামে) A man who has enemies can not live at ease.
At every step (প্রতি পদে পদে): There are dangers at every step in our life and yet we want to live.
Bad blood - (শত্রুতা): There has always been bad blood between these families.
Burning question - (গুরুত্বপূর্ন বিষয়): Poverty problem is a burning question of our country.
Pick one’s pocket (পকেট মারা)— He tried to pick my pocket.