Vertical angle : শীর্ষকোণ;
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Appropriate Prepositions
Abound with(ছেয়ে থাকা): They live in a region that abounds with oil.
Object to (আপত্তি করা): He objected to my proposal.
Rid of (মুক্তি দেওয়া): He will get rid of troubles soon.
Run into (জড়িয়ে পড়া): He had run into debt.
Work with (কারো সাথে কাজ করা): They will be working with me on the new project.
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Idioms
At a discount (অনাদৃত) Female education is no longer at a discount now.
Crocodile tears (মায়াকান্না): He shed crocodile tears at our misery.
Lump sum (এক কালীন) — He gave us lump sum money.
To the contrary (against what some one had said, পক্ষান্তরে) —He said nothing to the contrary.
Wild goose chase (useless pursuit, পন্ডশ্রম) —Do not waste time in wild goose chase.