Extemporise : পূর্বপ্রস্তুতি ব্যতীত বলা বা বক্তৃতা করা;
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Appropriate Prepositions
Avail (oneself) of(সুযোগের স্বব্যবহার করা): I shall avail myself of the first trip to London tomorrow.
Careless of(অসতর্ক): Do not be careless of your health.
Dependent on (নির্ভরশীল): Sepm is dependent on his father.
Guess at (অনুমান করা): It is difficult to guess at the age of women.
Indifferent to (উদাসীন): Everybody is indifferent to my problem.
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Idioms
Be all and end all (the ultimate out come- চরম পরিণতি—n) A loss of one million taka was the be all and end all of the projects.
Foul play (অসদাচারণ করা): We feared that he had met with foul play.
Gala day (বিশেষ দিন): The Eid–Ul-Fitr is a gala day for Muslims.
Ins and out (খুঁটিনাটি): I know ins and outs of this file.
Pandora’s box (আপাতঃ দৃষ্টিতে ভালো মনে হলেও আসলে ভালো নয়)—His words proved to be Pandora’s box.