Optical centre : নেত্রিক কেন্দ্র;
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Appropriate Prepositions
Burdened with (ভারাক্রান্ত): Rahim is burdened with a big family.
Convinced of (আশ্বস্ত): You are convinced of his product.
Die from (কোন কিছু জন্য মারা যাওয়া): The poor person died from hunger.
Monument to (স্মৃতিসৌধ): The monument to your right is a popular tourist attraction.
Similar to (সদৃশ): My T-shirt is similar to yours.
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Idioms
At the eleventh hour (at the last moment-শেষ মুহুর্তে adv.) The patient was in a dangerous condition and the doctor came at the eleventh hour.
Bad book (disfavour-খারাপ নজর —n) The secretary has fallen in the bad book of the manager.
Fish in a troubled water (এলোমেলো অবস্থার সুযোগ নেয়া): He made a lot of money by fishing in a troubled water.
Give one’s right arm (বিপদের ঝুকি নেয়া): I will give my right arm if I could manage the tickets.
Head and ears (সম্পূর্ণরূপে): He is over head and ears in debt.