Hey Timur. Great that you are asking here to improve your English. There are some mistakes in your sentences. Let me try to correct them: 1. What kind of haircut would you like? What kind of haircut do you want me to give you? 2. In which shop are the prices for TV sets the cheapest? 3. Where is my book? I cant find it anywhere. 4. Before going to the conference they put on black suits to look confident/intimidating/professional. (Big doesnt fit here) I hope I could help a bit :)

Which store has the lowest prices for TVs? ( keep it simple )

What haircut do you want ? How do you want me to cut your hair ? Which shops offer the lowest/best prices for TV sets ? / Which shop sell TV sets at the lowest price? / Where can I buy TV sets at the cheapest prices ?> In which shop are the prices for TV sets at the cheapest ? Where is my book? I can't find it anywhere. What has become of my book ! I can't recognised it now . Before going to the conference, they put on black suits to look impressive/stylish/professional/corporate and chic.