Helpfulness : উপকারিতা; কাজেরতা;
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Appropriate Prepositions
Aim at(আঘাত করার জন্য লক্ষ্য স্থির করা): The hunter aimed at the tiger.
Attention to(মনোযোগ): He has no attention to his studies.
Contemporary of (সমসাময়িক): William Wordsworth was a contemporary for greater efficiency.
Debar from (বঞ্চিত হওয়া/বাধা দেওয়া): He is debarred from getting a job.
Enter into (কোনো কিছুতে আবদ্ধ হওয়া): pma entered into a new agreement.
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Idioms
At random (indiscriminately—এলোপাথাড়ি-adv.) He talks at random like a mad man.
Die in harness (কর্মরত অবস্থায় মারা যাওয়া): Dr. Sen died in harness.
For good (চিরদিনের জন্য): He left the house for good.
To and fro (hither and thither, এদিক ওদিক)-The man is walking to and fro.
Yellow dog (হীন ব্যক্তি) - A yellow dog is always hated by all.