Step sister : সৎবোন;
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Appropriate Prepositions
Adhere to (লেগে থাকা, অটল থাকা): You should adhere to your principal.
Bad at (অদক্ষ): He is not bad at English.
Careful of (সতর্ক): He is very careful of his fault.
Competent for(যোগ্য): He is not competent for the post.
Sorry for (দুঃখিত): He is sorry for his misdeeds.
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Idioms
Do yeoman’s service (বিশেষ উপকার করা): Freedom fighters have done yeoman’s service for country.
Pandora’s box (আপাতঃ দৃষ্টিতে ভালো মনে হলেও আসলে ভালো নয়)—His words proved to be Pandora’s box.
Pass away (মারা যাওয়া)— He passed away last night.
To the utmost (যথাসাধ্য) - I tried to the utmost of my ability to have a job.
Take into account (বিবেচনা করা): Your activities should be taken into account.