Nuts and bolts : ব্যবহারিক খুঁটিনাটি;
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Appropriate Prepositions
Adapt to(খাপ খাওয়ানো): Everybody must adopt himself to new environment.
Adept in (দক্ষ): He is adept in playing football.
Averse to (বিমুখ): Rahim was averse of your various problems.
Catch at(ধরা): A drowning man catches at a straw.
Deprived of (বঞ্চিত): He was deprived of education due to extreme poverty.
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Idioms
At times (মাঝে মাঝে): He at times comes here.
At liberty (free-মুক্ত-adj.) They are at liberty to go anywhere.
Bring to book (reproach-Start- ভর্ৎসনা করা) The father brought his son to book for his failure in the exam.
Eat humble pie (অপমান হজম করে ক্ষমা চাওয়া): The manager had to eat humble pie before his employees.
Without fail (অবশ্যই) - You must attend the meeting without fail.