System of forces : বলশ্রেণি;
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Appropriate Prepositions
Abstain from(বিরত থাকা): I am trying to abstain from sweets for my new diet.
Busy with(ব্যস্ত থাকা): Rahim is now busy with her homework.
Entitled to (অধিকারী): He is entitled to a reward for honesty.
Feed on (খেয়ে বাঁচা): The cow feeds on grass.
Lost in (মগ্ন): Simon is lost in meditation.
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Idioms
At random (indiscriminately—এলোপাথাড়ি-adv.) He talks at random like a mad man.
Bad book (disfavour-খারাপ নজর —n) The secretary has fallen in the bad book of the manager.
Null and void (বাতিল): The deed has been null and void now.
On the contrary (বিপরীত পক্ষে): I do not hate him; on the contrary I love him.
Take into account (বিবেচনা করা): Your activities should be taken into account.