Roya and Mahsa are leaving the library. Roya: When I came in, you were reading a book. What was it? Mahsa: I was reading a book about famous Iranian scientists. Roya: But such books are not very interesting. Mahsa: At first I had the same idea, believe me! Roya: Did you find it useful? Mahsa: Oh yes. Actually I learned many interesting things about our scientists’ lives. Roya: Like what? Mahsa: For example Razi1 taught medicine to many young people while he was working in Ray Hospi ...