giúp e phần này với ạ e cảm ơn nhiềuu

21. The girl chatted with him yesterday. She arrived here at 6:30. (Relative Pronoun) - 22. I'm reading the book. I bought it in 1996. (Relative Pronoun) - 23. My friends had so much fun at the festival. They wanted to go there again. (Relative Pronoun) - 24. John is one of my closest ...