Jack screw : গুরুভার বস্তু তুলিবার পেঁচালো যন্ত্র;
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Appropriate Prepositions
Congratulate on(অভিনন্দন জানানো): They congratulated me on my brilliant success.
Count upon(নির্ভর করা): He always counts upon your help for this work.
Eager for, about (একাগ্র): The students for this school are eager for knowledge. The teacher is eager about the success of his students.
Perfect for (সঠিক, মানানসই): The new book is perfect for you.
Remind of (স্মরণ করিয়ে দেওয়া): He reminded me of his request to lend him some money.
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Idioms
At one’s elbow (near at hand — হাতের কাছে – adv.) His private secretary is always at his elbow.
Of course (অবশ্যই): Of course, you know what that meant.
To the brim (কানায় কানায়) - The river was full to the brim.
Three score (ষাট): He is happy as his brother got three score.
Tooth and nail (strongly, প্রবলভাবে)-He fought tooth and nail against his enemy.