"Have you read them?"
अनुवाद:क्या आपने उन्हें पढ़ा है?
'Have u read them' is text language and is used just to make it faster and easier while typing. But on such a platform, it wouldn't make sense to teach people or to accept text language, because people are learning proper 'English' here and not text language. So you have to use 'you'.