Firsthand : সরাসরি; হাতে-কলমে;
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Appropriate Prepositions
Careful of (সতর্ক): He is very careful of his fault.
Convinced of (আশ্বস্ত): You are convinced of his product.
Repent of (অনুতাপ করা): I repented of my past.
Shout at (চিৎকার করে ডাকা): Do not shout at your parents.
Sick of (ক্লান্ত): He is sick of this idle life.
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Idioms
Breathe one’s last (decease, die- শেষ নিঃশেষ ত্যাগ করা, মরে যাওয়া) The man breathed his last in his native village.
Burning question - (গুরুত্বপূর্ন বিষয়): Poverty problem is a burning question of our country.
Pandora’s box (আপাতঃ দৃষ্টিতে ভালো মনে হলেও আসলে ভালো নয়)—His words proved to be Pandora’s box.
Speed money (ঘুষ; উৎকোচ): He hankers after speed money.
Turn down (refuse, প্রত্যাখান করা) —He turned down my proposal.