Crack-a-jack : মেধাবী;
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crack-a-jack  crack-jaw  See Words Also In
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Appropriate Prepositions
Attacked by(আক্রান্ত ব্যক্তিবাচক): He has been attacked by a gang of robbers.
Attention to(মনোযোগ): He has no attention to his studies.
Care of(যত্ন নেওয়া): You should take care of your health.
Complain to (কারো কাছে নালিশ করা): You should not complain to his parents.
Congenial to(উপযোগী): The atmosphere is congenial to your health.
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Idioms
After all - (সব কথার পরেও): I rang and told her I couldn't come after all.
Get rid of (মুক্তি পাওয়া): Try to get rid of the rogue.
Ins and out (খুঁটিনাটি): I know ins and outs of this file.
Salt of the earth (গুরুত্বপূর্ণ ব্যক্তিবর্গ) —The salt of the earth is remembered always.
With a view to (উদ্দেশ্য)- He goes to college with a view to attending the class.