Good job. A few notes: #2: This is correct, but since it sounds quite direct, you would say this only to a close friend or family member, not to a stranger. #3: "What of me?" is not correct, it is missing a verb, but I'm not sure what the intention is. Perhaps, "What is mine?" #5: Could you please explain what this means? I can't think of a (polite) situation where I would say this. It also sounds like "Who do you think you are?" which is quite rude and could start a fight. #8. I noticed your source language (Bengali?) ends with an ellipsis (the three dots), so I assume this isn't a question like "Do you mean that?" but an unfinished sentence. In that case, your English is correct. #19. "Is it?" could only be said in response to a previous statement, but since there is no context, I can't tell what this sentence should be. For example, if someone says "It just started raining." I could say "Oh, is it? or "Is it really?" (implying I'm surprised). I could also say "Is that so?" Let me know if this sentence was meant to imply something else.

Overall good attempt. Just 2 corrections were needed.

I am not a native, but check for number 5, I think it should be : Who do you think you are? I want to know it too. Your language is really beautiful for the design of letters!