Keep an eye on : নজরে রাখা; নজর রাখা; চক্ষুয় রাখা; চক্ষু দেত্তয়া;
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Appropriate Prepositions
Absorbed in(মগ্ন): I am absorbed in my study.
Adjacent to(সংলগ্ন): The Post Office is adjacent to my house.
Ask about (কাউকে খোঁজ করা): Rahim asked about Karim.
Indulge in (প্রশ্রয় দেওয়া): You should not indulge in idleness.
Side with (পক্ষ অবলম্বন করা): The Chairman sided with the powerful party.
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Idioms
Bad names (গালমন্দ—n) He called the man bad names.
Call in question (সন্দেহ করা): No one can call his honesty in question.
Out of order (বিকল): The elevator was out of order.
Silver living (hope- আশা বা ভালো দিক): Every cloud has a silver lining.
Up to (পর্যন্ত) - I have done the exercises up to page 40.