Unquestionable : সন্দেহাতীত; প্রশ্নাতীত;
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Appropriate Prepositions
Abstain from(বিরত থাকা): I am trying to abstain from sweets for my new diet.
Aim at(আঘাত করার জন্য লক্ষ্য স্থির করা): The hunter aimed at the tiger.
Burst into(কান্নায় ভেঙ্গে পড়া): He burst into tears.
Change into (পরিবর্তিত হওয়া): At what point does boiling water change into vapor.
Consistent with(সামঞ্জস্যপূর্ণ): Your action is not consistent with your word.
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Idioms
At death’s door (at the point of death- মৃত্যুর দ্বারে) The patient is now at death’s door.
Call in question (সন্দেহ করা): No one can call his honesty in question.
In the long run (পরিণামে): You will have to suffer in the long run.
Pack of lies (ডাঁহা মিথ্যা)—He told pack of lies to prove himself innocent.
Rank and file (সাধারণ লোক): We should pay attention to the rank and file of the country.