Secret agent : গুপ্তচর;
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Appropriate Prepositions
Bad at (অদক্ষ): He is not bad at English.
Call on(কারও সাথে দেখা করা): I called on him in his office.
Careless of(অসতর্ক): Do not be careless of your health.
Look at (তাকানো): Students look at the blackboard.
Satisfied with (সন্তুষ্ট): The authoress was highly satisfied with Jerry.
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Idioms
Bad blood - (শত্রুতা): There has always been bad blood between these families.
Dead of night (মধ্যরাত্রি): The robbers broke into the house at dead of night.
Pick a quarrel (ঝগড়া করা)—Do not pick a quarrel.
Through thick and thin (through all difficulties, সমস্ত সমস্যার মধ্যে)-Ruma followed her husband through thick and thin.
With the sweat of one’s brow (মাথার ঘাম পায়ে ফেলে) — He earns his livelihood with the sweat of his brow.