Hard and fast rules : ধরাবাঁধা নিয়মকানুন;
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Appropriate Prepositions
Abide with(সঙ্গে থাকা): If you would like to rest for a while, you can abide with me.
Arrange for(ব্যবস্থা করা): We have arranged everything for our study tour.
Fantasize about (কল্পনা করা): They fantasized about winning the lottery.
Infested with (অতিষ্ঠ): The room is infested with rats.
Object to (আপত্তি করা): He objected to my proposal.
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Idioms
A bed of roses - (সুখকর অবস্থা): Life is not a bed of roses.
Follow the footsteps of (পায়ে পায়ে অনুসরণ করা): People always follow the footsteps of some great man.
Man of straw (অপদার্থ): We do not care for a man of straw like you.
Slip of the pen (লেখায় অসতর্কতাবশত সামান্য ভুল): The mistake is due to a slip of the pen.
Square meal (পেট ভরা আহার): He is too poor to have a square meal everyday.