Crust of the earth : ভূ-ত্বক;
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Appropriate Prepositions
Abhorrence of (ঘৃণা): Everyone should have abhorrence of a par.
Agree with, on, to(একমত হওয়া): My father agreed with me on this point, but he did not agree to my proposal to set up a canteen.
Argue over (কোন বিষয়ে তর্ক করা): The kids are arguing over which TV program to watch.
Defend against (রক্ষা করা): We will defend our country against all enemies.
Entrust to (কাউকে কোনো কিছু বিশ্বাস করে দেওয়া): He entrusted the thing to me.
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Idioms
At one’s elbow (near at hand — হাতের কাছে – adv.) His private secretary is always at his elbow.
As ill-luck would have it (unfortunately- দুর্ভাগ্যবশত) A child was born to them but, as ill-luck would have it, it died when it was eight days old.
Fish in a troubled water (এলোমেলো অবস্থার সুযোগ নেয়া): He made a lot of money by fishing in a troubled water.
Set free (মুক্ত করা): The prisoners were set free.
Ups and downs (উত্থান পতন): There are ups and downs in a man’s life.