Celestial sphere : খগোল; জ্যোতিষ্কমণ্ডল;
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Appropriate Prepositions
Adept in (দক্ষ): He is adept in playing football.
Careless of(অসতর্ক): Do not be careless of your health.
Consent to(মত দেওয়া): The Prime Minister consented to the proposal.
Hard of (কানে খাটো বা কম শোনা): Ratan is a hard of hearing.
Independent of (স্বাধীন): They are independent of my health.
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Idioms
At one’s elbow (near at hand — হাতের কাছে – adv.) His private secretary is always at his elbow.
Burning question - (গুরুত্বপূর্ন বিষয়): Poverty problem is a burning question of our country.
Now and then (মাঝে মাঝে): He comes here now and then.
On the wane (হ্রাসমান): His fame is on the wane now.
With might and main (যথা শক্তি দিয়ে) —He tried with might and main to help me.