Effectiveness : কার্যকারিতা;
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Appropriate Prepositions
Admit to(ভর্তি করা): The boy was admitted to class Nine.
Agree to(ব্যক্তি ছাড়া অন্যকিছুর সাথে একমত হওয়া): We cannot agree to your proposal.
Cause of(কারণ): Industry is the cause of your success.
Composed of(তৈরী): This medicine is composed of vitamins and minerals.
Quick at (চটপটে): A cashier must be quick at figures.
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Idioms
At all (in the least degree – মোটেও না) There is no water at all in the pond.
At a low ebb (in an unfavorable situation প্রতিকুল অবস্থায়, ভাটির মুখে) The popularity of this singer is now at a low ebb.
In one’s teens (তের থেকে উনিশ বছর বয়সের মাঝে): She is yet in her teens.
To the backbone (হাড়ে হাড়ে): I know this boy to the backbone.
Under age (অপ্রাপ্ত বয়স্ক)- He could not cast his vote because he was under age.