Catch word : বাঁধা বুলি; অভিনয়ে সংকেত-শব্দ;
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Appropriate Prepositions
Apart from(ছাড়া, ব্যতীত, দূরে): They pave apart from each other.
Arrive at(উপস্থিত হওয়া, পৌছানো): The train arrived at Dhaka station on time.
Breakdown of (বিস্তারিত): Here is statistical breakdown of data.
Call in(ডাকিয়া আনা): They called in a doctor.
Deal in (কোনো কিছুর ব্যবসা করা): They deal in green vegetables.
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Idioms
At one’s elbow (near at hand — হাতের কাছে – adv.) His private secretary is always at his elbow.
Now and then (মাঝে মাঝে): He comes here now and then.
Pandora’s box (আপাতঃ দৃষ্টিতে ভালো মনে হলেও আসলে ভালো নয়)—His words proved to be Pandora’s box.
Set something right (ঠিক করা)— He will set the machine right.
To the letter (in all details, অক্ষরে অক্ষরে) —Follow my advice to the letter.