Mn lm giúp e vs ạ Mk c.ơn

14.The bed has no mattress. I sleep on this bed. 15. There wasn't any directory in the telephone box. I was phoning from this box. IX. Rewrite, Using Prepositions + Relative Pronouns: Dùng giới từ đặt trước đại từ quan 1. Those are the books. He has just bought them from the bookstore. ...