Confidential letter : গোপনীয় পত্র;
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Appropriate Prepositions
Authority over (কর্তৃত্ব, আধিপত্য): She has no authority over his growing daughters.
Control over(নিয়ন্ত্রণ): He has no control over his sons.
Look after (দেখাশুনা): He looks after me.
Match for (প্রতিদ্বন্দ্বী): He is no match for me.
Subsist on (বেঁচে থাকা): The poor subsist mainly on rice and pulses.
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Idioms
At a low ebb (in an unfavorable situation প্রতিকুল অবস্থায়, ভাটির মুখে) The popularity of this singer is now at a low ebb.
Dead of night (মধ্যরাত্রি): The robbers broke into the house at dead of night.
Lion’s share (বড় মাপের অংশ): He took the lion’s share of the profit.
On the contrary (বিপরীত পক্ষে): I do not hate him; on the contrary I love him.
Out of temper (ক্রুদ্ধ): The teacher is out temper to see the overall results.