第13题: [单项选择]Questions 19 to 22 are based on the conversation you have just heard. A. It hasn’t been bought by the librarian. B. It has been taken by a student. C. It has been lent out. D. It has been placed on reserve. 参考答案:D 答案解析:[听力原文] Why can’t the boy find the book
根据馆员所说的“Oh yes.Your professor has placed this book