Cloak and dagger : ষড়যন্ত্রের ও গুপ্তচরবৃত্তির নীতি;
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Appropriate Prepositions
Complain about (কোনো বিষয়ে নালিশ করা): They complained about the mismanagement of the programme.
Deal in, with, out (ব্যবসা করা, ব্যবহার করা, বন্টন করা): The man deals in rice. He does not know how to deal with a customer. The Chairman dealt out the relief materials to the flood affected people.
Full of (পরিপূর্ণ): Our Rivers are full of fishes.
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
All in - (পরিশ্রান্ত): I was all in after the meeting.
In vogue (চালু): This custom is not in vogue at present.
In one’s teens (তের থেকে উনিশ বছর বয়সের মাঝে): She is yet in her teens.
Set free (মুক্ত করা): The prisoners were set free.
Worthy of (যোগ্য) - He is worthy of a good job.