单项选择题
A．To explain how present-day reading habits developed. B．To change people's attitudes to reading. C．To show how reading methods have improved. D．To encourage the growth of readin
A．a change in the status of literate people B．a change in the nature of reading C．an increase in the number of books D．an increase in the average age of readers
A．the importance of silent reading B．the amount of information yielded by books and newspapers C．the effects of reading on health D．the value of different types of reading material